[Rd] error in parallel:::sendMaster
Andreas Kersting
r-deve| @end|ng |rom @ker@t|ng@de
Thu Nov 28 13:54:31 CET 2019
Hi Tomas,
I rebuild R (v3.5.2 for now, R-devel to follow) from the Debian package with MC_DEBUG defined and hopefully also with "-Wall -O0 -gdwarf-2 -g3", though I still have to verify this.
Below is the output. I think it is a total of two mclapply invocations in this R session, the failing one starting around the lines "[1] 15381" and "[1] 15382". The "Error in partDF::write_partDF ..." is because the script/package checks the return value of mclapply and detects that it is not a list of length 85 with only the elements "TRUE".
Regarding sending you the complete example: I first have to figure out if this is possible at all, because it would involve data of a client.
Regards,
Andreas
parent[15366] created pipes: comm (6->5), sir (8->7)
parent registers new child 15379
child process 15379 started
parent[15366] created pipes: comm (7->6), sir (10->9)
parent registers new child 15380
child process 15380 started
select_children: added child 15380 (6)
select_children: added child 15379 (5)
select_children: maxfd=6, wlen=2, wcount=2, timeout=-1.000000
child 15380: send_master (550 bytes)
sr = 1
- read select 1 children: 15380
child 15380: 'mcexit' called
child 15380 is waiting for permission to exit
read_child_ci(15380) - read length returned 8
read_child_ci(15380) - read 550 at 0 returned 550
select_children: added child 15380 (6)
select_children: added child 15379 (5)
select_children: maxfd=6, wlen=2, wcount=2, timeout=-1.000000
sr = 1
- read select 1 children: 15380
read_child_ci(15380) - read length returned 8
detached child 15380 (signal 10)
child process 15380 got SIGUSR1; child_exit_status=-1
child 15380: exiting
select_children: added child 15379 (5)
select_children: maxfd=5, wlen=1, wcount=1, timeout=-1.000000
child 15380 terminated with exit status 0
child 15379: send_master (550 bytes)
sr = 1
- read select 1 children: 15379
read_child_ci(15379) - read length returned 8
read_child_ci(15379) - read 550 at 0 returned 550
select_children: added child 15379 (5)
select_children: maxfd=5, wlen=1, wcount=1, timeout=-1.000000
child 15379: 'mcexit' called
child 15379 is waiting for permission to exit
sr = 1
- read select 1 children: 15379
read_child_ci(15379) - read length returned 8
detached child 15379 (signal 10)
child process 15379 got SIGUSR1; child_exit_status=-1
child 15379: exiting
removing waited-for child 15380 from the list
killed detached child 15379 (signal 15)
removing waited-for child 2147483647 from the list
child 15379 terminated with exit status 0
removing waited-for child 15379 from the list
parent[15366] created pipes: comm (6->5), sir (8->7)
parent registers new child 15381
child process 15381 started
parent[15366] created pipes: comm (7->6), sir (10->9)
[1] 15381
parent registers new child 15382
child process 15382 started
select_children: added child 15382 (6)
select_children: added child 15381 (5)
select_children: maxfd=6, wlen=2, wcount=2, timeout=-1.000000
sr = 1
- read select 1 children: 15382
read_child_ci(15382) - read length returned 0
detached child 15382 (signal 10)
child process 15382 got SIGUSR1; child_exit_status=-1
select_children: added child 15381 (5)
select_children: maxfd=5, wlen=1, wcount=1, timeout=-1.000000
[1] 15382
child 15382: send_master (526 bytes)
Error in sendMaster(try(lapply(X = S, FUN = FUN, ...), silent = TRUE)) :
write error, closing pipe to the master
Calls: lapply ... <Anonymous> -> <Anonymous> -> lapply -> FUN -> sendMaster
child 15382: 'mcexit' called
child 15382: exiting
child 15382 terminated with exit status 1
child 15381: send_master (538 bytes)
sr = 1
- read select 1 children: 15381
read_child_ci(15381) - read length returned 8
read_child_ci(15381) - read 538 at 0 returned 538
child 15381: 'mcexit' called
child 15381 is waiting for permission to exit
select_children: added child 15381 (5)
select_children: maxfd=5, wlen=1, wcount=1, timeout=-1.000000
sr = 1
- read select 1 children: 15381
read_child_ci(15381) - read length returned 8
detached child 15381 (signal 10)
child process 15381 got SIGUSR1; child_exit_status=-1
child 15381: exiting
removing waited-for child 15382 from the list
killed detached child 15381 (signal 15)
removing waited-for child 2147483647 from the list
Error in partDF::write_partDF(X, out_path, c("Date", "Panel", "Type", :
at least one core did not return from parllel write; maybe it was killed (be the Linux Out of Memory Killer ?) or there was a fatal error in the forked process(es)
Calls: lapply -> FUN -> write_partDF_repo -> <Anonymous>
Execution halted
killed detached child 15381 (signal 9)
child 15381 terminated with exit status 0
removing waited-for child 15381 from the list
process 15366 parallel shutdown ok
2019-11-28 10:40 GMT+01:00 Tomas Kalibera<tomas.kalibera using gmail.com>:
> Hi Andreas,
> thank you very much, good job finding it was EBADF. Now the question is=20
> why the pipe has been closed prematurely; it could be accidentally by R=20
> (a race condition in the cleanup code in fork.c) or possibly by some=20
> other code running in the same process (maybe the R program itself or=20
> some other code it runs). Maybe we can take this off the list and come=20
> back when we know the cause or have it fixed.
>
> It would help a lot if you could try with R built from source, with=20
> optimizations disabled to get more accurate debug symbols (e.g. env=20
> CFLAGS=3D"-Wall -O0 -gdwarf-2 -g3" CXXFLAGS=3D"-Wall -O0 -gdwarf-2 -g3"=20
> =2E/configure), and with MC_DEBUG defined in fork.c - line 26. Ideally in=
> =20
> R-devel, so that we are sure the problem still exists. The debug=20
> messages should give a hint whether it was R (fork.c) that closed the=20
> pipe and why. Maybe you could also add a debug message to=20
> close_fds_child_ci() to see if it was closed there. Maybe you could find =
>
> this out even in your current debugging setup via breakpoints and=20
> backtraces, but I think it may be easier to build from source with these =
>
> debugging messages.
>
> Also if you could send me a complete example I could run that causes=20
> this on your system, that would be nice (even if it didn't cause the=20
> problem on my system).
>
> Thanks
> Tomas
>
> On 11/28/19 6:35 AM, Andreas Kersting wrote:
>> Hi Tomas,
>>
>> Thanks for your prompt reply and your offer to help. I might need to ge=
> t back to this since I am not too experienced in debugging these kinds of=
> issues. Anyway, I gave it a try and I think I have found the immediate c=
> ause:
>>
>> I installed the debug symbols (r-base-core-dbg), placed https://github.=
> com/wch/r-source/blob/tags/R-3-5-2/src/library/parallel/src/fork.c in cwd=
> and changed the wrapper code to:
>>
>> mc_ret <- parallel::mclapply(seq_len(nrow(parts)), function(i) {
>> # we fail for the input resulting in parts having 85 rows
>> if (nrow(parts) =3D=3D 85L && !file.exists(as.character(Sys.getpid=
> ()))) {
>> file.create(as.character(Sys.getpid()))
>> print(Sys.getpid())
>> Sys.sleep(30)
>> }
>>
>> # ...
>>
>> return(TRUE)
>> }, mc.preschedule =3D TRUE, mc.cores =3D 2L)
>>
>> This way I ended up with only two child processes to which I each attac=
> hed a debugger. In total I ran about 10 debugging sessions and it was alw=
> ays the second child process failing. The errno after write returned -1 w=
> as 9 (EBADF).
>>
>> From what I can see, the reason for this is that the second child trie=
> s to write to fd 7, but already during the very beginning of the first in=
> vocation of the anonymous function to parallelize, i.e. during Sys.sleep(=
> 30), there is no such file descriptor. From this observation I would conc=
> lude that it is NOT the code run from that function, i.e. # ..., causing=
> the issue. Let me point out again, that this is NOT the very first invoc=
> ation of mclapply in this R session. There is at least one previous call =
> to it, which works fine.
>>
>>
>> File descriptors directly after attaching gdb to both child processes d=
> uring Sys.sleep(30):
>>
>> ### master
>> root using ip-10-0-48-30:~/latest_test# ls -l /proc/22119/fd
>> total 0
>> lrwx------ 1 root root 64 Nov 28 04:49 0 -> /dev/pts/0
>> lrwx------ 1 root root 64 Nov 28 04:49 1 -> /dev/pts/0
>> lrwx------ 1 root root 64 Nov 28 04:49 2 -> /dev/pts/0
>> lr-x------ 1 root root 64 Nov 28 04:49 3 -> /path/to/script.R
>> lrwx------ 1 root root 64 Nov 28 04:49 4 -> /path/on/nfs/write.lock
>> lr-x------ 1 root root 64 Nov 28 04:49 5 -> 'pipe:[266120]'
>> l-wx------ 1 root root 64 Nov 28 04:49 8 -> 'pipe:[266121]'
>>
>>
>> ### first child (writes to fd 6)
>> (gdb) shell ls -l /proc/22134/fd
>> total 0
>> lrwx------ 1 root root 64 Nov 28 04:42 0 -> /dev/pts/0
>> lrwx------ 1 root root 64 Nov 28 04:42 1 -> /dev/pts/0
>> lrwx------ 1 root root 64 Nov 28 04:42 2 -> /dev/pts/0
>> lr-x------ 1 root root 64 Nov 28 04:42 3 -> /path/to/script.R
>> lrwx------ 1 root root 64 Nov 28 04:42 4 -> /path/on/nfs/write.lock
>> l-wx------ 1 root root 64 Nov 28 04:42 6 -> 'pipe:[266120]'
>> l-wx------ 1 root root 64 Nov 28 04:42 8 -> 'pipe:[266121]'
>>
>> ### second child (tries writing to fd 7)
>> (gdb) shell ls -l /proc/22135/fd
>> total 0
>> lr-x------ 1 root root 64 Nov 28 04:42 0 -> 'pipe:[266123]'
>> lrwx------ 1 root root 64 Nov 28 04:42 1 -> /dev/pts/0
>> l-wx------ 1 root root 64 Nov 28 04:42 10 -> 'pipe:[266123]'
>> lrwx------ 1 root root 64 Nov 28 04:42 2 -> /dev/pts/0
>> lr-x------ 1 root root 64 Nov 28 04:42 3 -> /path/to/script.R
>> lrwx------ 1 root root 64 Nov 28 04:42 4 -> /path/on/nfs/write.lock
>>
>>
>> # debugging mc_send_master in both child processes:
>>
>> ### first child (all OK):
>> (gdb) break mc_send_master
>> Breakpoint 1 at 0x7f5b2687b0a0: file fork.c, line 681.
>> (gdb) c
>> Continuing.
>>
>> Breakpoint 1, mc_send_master (what=3D0x555c6dd2cd00) at fork.c:681
>> warning: Source file is more recent than executable.
>> 681 {
>> (gdb) info args
>> what =3D 0x555c6dd2cd00
>> (gdb) n
>> 682 if (is_master)
>> (gdb) n
>> 684 if (master_fd =3D=3D -1)
>> (gdb) n
>> 686 if (TYPEOF(what) !=3D RAWSXP)
>> (gdb) n
>> 688 R_xlen_t len =3D XLENGTH(what);
>> (gdb) n
>> 689 unsigned char *b =3D RAW(what);
>> (gdb) n
>> 693 if (writerep(master_fd, &len, sizeof(len)) !=3D sizeof(len)) {
>> (gdb) info locals
>> len =3D 538
>> b =3D <optimized out>
>> n =3D <optimized out>
>> (gdb) s
>> writerep (fildes=3D6, buf=3Dbuf using entry=3D0x7ffdd6da7db0, nbyte=3Dnbyte using e=
> ntry=3D8)
>> at fork.c:653
>> 653 {
>> (gdb) info args
>> fildes =3D 6
>> buf =3D 0x7ffdd6da7db0
>> nbyte =3D 8
>> (gdb) n
>> 654 size_t wbyte =3D 0;
>> (gdb) n
>> 653 {
>> (gdb) n
>> 657 ssize_t w =3D write(fildes, ptr + wbyte, nbyte - wbyte);
>> (gdb) n
>> 658 if (w =3D=3D -1) {
>> (gdb) n
>> 657 ssize_t w =3D write(fildes, ptr + wbyte, nbyte - wbyte);
>> (gdb) n
>> 658 if (w =3D=3D -1) {
>> (gdb) n
>> 664 if (w =3D=3D 0) {
>> (gdb) n
>> 670 wbyte +=3D w;
>> (gdb) n
>> 671 if (wbyte =3D=3D nbyte)
>> (gdb) n
>> 672 return wbyte;
>> (gdb) n
>> 674 }
>> (gdb) n
>> mc_send_master (what=3D<optimized out>) at fork.c:699
>> 699 for (R_xlen_t i =3D 0; i < len; i +=3D n) {
>> (gdb) n
>> 700 n =3D writerep(master_fd, b + i, len - i);
>> (gdb) n
>> 701 if (n < 1) {
>> (gdb) n
>> 699 for (R_xlen_t i =3D 0; i < len; i +=3D n) {
>> (gdb) n
>> 707 return ScalarLogical(1);
>> (gdb) n
>> 708 }
>>
>>
>>
>> ### second child (write fails with EBADF):
>> (gdb) break mc_send_master
>> Breakpoint 1 at 0x7f5016f3e0a0: file fork.c, line 681.
>> (gdb) c
>> Continuing.
>>
>> Breakpoint 1, mc_send_master (what=3D0x563382a71910) at fork.c:681
>> warning: Source file is more recent than executable.
>> 681 {
>> (gdb) info args
>> what =3D 0x563382a71910
>> (gdb) n
>> 682 if (is_master)
>> (gdb) n
>> 684 if (master_fd =3D=3D -1)
>> (gdb) n
>> 686 if (TYPEOF(what) !=3D RAWSXP)
>> (gdb) n
>> 688 R_xlen_t len =3D XLENGTH(what);
>> (gdb) n
>> 689 unsigned char *b =3D RAW(what);
>> (gdb) n
>> 693 if (writerep(master_fd, &len, sizeof(len)) !=3D sizeof(len)) {
>> (gdb) info locals
>> len =3D 526
>> b =3D <optimized out>
>> n =3D <optimized out>
>> (gdb) s
>> writerep (fildes=3D7, buf=3Dbuf using entry=3D0x7fff4027ad60, nbyte=3Dnbyte using e=
> ntry=3D8)
>> at fork.c:653
>> 653 {
>> (gdb) info args
>> fildes =3D 7
>> buf =3D 0x7fff4027ad60
>> nbyte =3D 8
>> (gdb) n
>> 654 size_t wbyte =3D 0;
>> (gdb) n
>> 653 {
>> (gdb) n
>> 657 ssize_t w =3D write(fildes, ptr + wbyte, nbyte - wbyte);
>> (gdb) n
>> 658 if (w =3D=3D -1) {
>> (gdb) info locals
>> w =3D <optimized out>
>> wbyte =3D 0
>> ptr =3D 0x7fff4027ad60 "\016\002"
>> (gdb) n
>> 657 ssize_t w =3D write(fildes, ptr + wbyte, nbyte - wbyte);
>> (gdb) n
>> 658 if (w =3D=3D -1) {
>> (gdb) n
>> 659 if (errno =3D=3D EINTR)
>> (gdb) n
>> 674 }
>> (gdb) p __errno_location()
>> $1 =3D (int *) 0x7f50322cb540
>> (gdb) x/x $1
>> 0x7f50322cb540: 0x00000009
>> (gdb) python import errno
>> (gdb) python print(errno.errorcode[9])
>> EBADF
>> (gdb) n
>> mc_send_master (what=3D<optimized out>) at fork.c:702
>> 702 close(master_fd);
>> (gdb) n
>> 704 error(_("write error, closing pipe to the master"));
>> (gdb) n
>> 703 master_fd =3D -1;
>> (gdb) n
>> 704 error(_("write error, closing pipe to the master"));
>> (gdb) n
>> 685 error(_("there is no pipe to the master process"));
>>
>>
>> Does this help in any way?
>>
>> Is there something else I can/should look at?
>>
>> Regards,
>> Andreas
>>
>>
>> 2019-11-27 15:04 GMT+01:00 Tomas Kalibera<tomas.kalibera using gmail.com>:
>>> Hi Andreas,
>>> the error is reported when some child process cannot send results to t=
> he master process, which originates from an error returned by write() - w=
> hen write() returns -1 or 0. The logic around the writing has not changed=
> since R 3.5.2. It should not be related to the printing in the child, on=
> ly to returning the value. The problem may be originating from the execut=
> ion environment, virtualization, and/or possibly from a lack of robustnes=
> s in R. To resolve this we need to find out which error was returned and =
> why. Either you can try to create a reproducible example (something I cou=
> ld use to trigger an error on my system and then debug) or to debug on yo=
> ur system (build R from source, ensure the bug is still triggered, then i=
> nstrument to print the exact error from the OS and where it was detected,=
> etc). In principle you could also try without code instrumentation just =
> using strace. Just from looking at the code in R around the writing I am =
> not seeing any bug there. If you choose to debug on your system I can hel=
> p with the instrumentation.
>>>
>>> Best
>>> Tomas
>>>
>>> On 11/27/19 12:40 PM, Andreas Kersting wrote:
>>>> Hi again,
>>>>
>>>> One important correction of my first message: I misinterpreted the ou=
> tput. Actually in that R session 2 input files were processed one after t=
> he other in a loop. The first (with 88 parts went fine). The second (with=
> 85 parts) produced the sendMaster errors and failed. If (in a new sessio=
> n via Rscript) I only process the second input file it will work. The oth=
> er observations on R vs Rscript, NFS share etc. still hold.
>>>>
>>>> Sorry for this! Regards,
>>>> Andreas
>>>>
>>>> 2019-11-27 12:10 GMT+01:00 Andreas Kersting<r-devel using akersting.de>:
>>>>> Hi,
>>>>>
>>>>> I am facing a very weird problem with parallel::mclapply. I have a s=
> cript which does some data wrangling on an input dataset in parallel and =
> then writes the results to disk. I have been using this script daily for =
> more than one year always on an EC2 instance launched from the same AMI (=
> no updates installed after launch) and processed thousands of different i=
> nput data sets successfully. I now have an input dataset for which I face=
> the following bug:
>>>>>
>>>>> The basic outline of the problematic section of the script:
>>>>>
>>>>> # parts is a data.table with 88 rows
>>>>> mc_ret <- parallel::mclapply(sample.int(nrow(parts)), function(i) {
>>>>> # do some data wrangling and write the result to a file
>>>>> # ...
>>>>>
>>>>> print(paste0("part ", i, " written successfully."))
>>>>> return(TRUE)
>>>>> }, mc.preschedule =3D FALSE, mc.cores =3D 2L)
>>>>>
>>>>> str(mc_ret)
>>>>>
>>>>>
>>>>> Expected output: "part i written successfully." is printed 88 times,=
> once for each value of i. mc_ret is a list of length 88, each element be=
> ing TRUE. Its structure is printed once. All outputs are created successf=
> ully.
>>>>>
>>>>> Actual output (see end of the message): "part i written successfully=
> =2E" is printed 88 times, once for each value of i. mc_ret is a list of l=
> ength 88, each element being TRUE. Its structure is printed. All outputs =
> are created successfully. So far so good.
>>>>>
>>>>> But then "part i written successfully." it is printed another X time=
> s, for values of i for which it was already printed. This output is inter=
> mingled with X-1 times the following error message:
>>>>>
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>>
>>>>> and Y times the message "Execution halted". mc_ret is printed again,=
> now being a list of length 85, with the first element being TRUE and all=
> other elements being NULL. X and Y vary from run to run.
>>>>>
>>>>>
>>>>> Now to the main problem: I tried very hard to create a reproducible =
> example, but I failed. What I observed:
>>>>> - The output is (and has always been) written to path which is on an=
> NFS share. If I instead write to a path on a local disk it will work.
>>>>> - The script is invoked using Rscript. If I instead source it from a=
> n interactive R session it works. There are at least two more people who =
> have observed this: https://stackoverflow.com/questions/51986674/mclapply=
> -sendmaster-error-only-with-rscript
>>>>> - Before the call to mclapply the code acquires an exclusive file lo=
> ck on a dedicated lock file, not written to but also on the NFS share. If=
> I remove the code acquiring the lock, the whole script will also work if=
> called using Rscript.
>>>>> - The problem also occurs for mc.preschedule =3D TRUE.
>>>>> - There is no error if I set mc.cores to 1.
>>>>> - And stressing again: the code works without any changes from Rscri=
> pt for thousands of other data sets.
>>>>>
>>>>>
>>>>> Rscript -e "sessionInfo()":
>>>>> R version 3.5.2 (2018-12-20)
>>>>> Platform: x86_64-pc-linux-gnu (64-bit)
>>>>> Running under: Ubuntu 18.04.2 LTS
>>>>>
>>>>> Matrix products: default
>>>>> BLAS: /usr/lib/x86_64-linux-gnu/openblas/libblas.so.3
>>>>> LAPACK: /usr/lib/x86_64-linux-gnu/libopenblasp-r0.2.20.so
>>>>>
>>>>> locale:
>>>>> [1] LC_CTYPE=3DC.UTF-8 LC_NUMERIC=3DC LC_TIME=3DC=
> =2EUTF-8
>>>>> [4] LC_COLLATE=3DC.UTF-8 LC_MONETARY=3DC.UTF-8 LC_MESSAGES=
> =3DC.UTF-8
>>>>> [7] LC_PAPER=3DC.UTF-8 LC_NAME=3DC LC_ADDRESS=3D=
> C
>>>>> [10] LC_TELEPHONE=3DC LC_MEASUREMENT=3DC.UTF-8 LC_IDENTIFICA=
> TION=3DC
>>>>>
>>>>> attached base packages:
>>>>> [1] stats graphics grDevices utils datasets methods base=
>
>>>>>
>>>>> loaded via a namespace (and not attached):
>>>>> [1] compiler_3.5.2
>>>>>
>>>>>
>>>>> I know this is a fairly old R version. I have not been able to repro=
> duce the bug with a more recent version, but since it is so difficult to =
> trigger, this does not mean much, I guess. I have looked through the chan=
> ges made to the code of mclapply since that version and could not find so=
> mething directly related. I am not even sure if it is a problem in the pa=
> rallel package or some other (memory) bug. What strikes me is that others=
> have observed a very similar error when using Rscript but not when using=
> an interactive R session, just like I do.
>>>>>
>>>>> I am not expecting a fix based on the information I provide, but may=
> be someone has some thoughts on this!?
>>>>>
>>>>> Regards,
>>>>> Andreas
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Actual output:
>>>>>
>>>>> [1] "part 51 written successfully."
>>>>> [1] "part 30 written successfully."
>>>>> [1] "part 32 written successfully."
>>>>> [1] "part 48 written successfully."
>>>>> [1] "part 63 written successfully."
>>>>> [1] "part 5 written successfully."
>>>>> [1][1] "part 14 written successfully." "part 18 written successfully=
> =2E"
>>>>>
>>>>> [1] "part 38 written successfully."
>>>>> [1] "part 11 written successfully."
>>>>> [1] "part 68 written successfully."
>>>>> [1] "part 45 written successfully."
>>>>> [1] "part 88 written successfully."
>>>>> [1] "part 36 written successfully."
>>>>> [1] "part 44 written successfully."
>>>>> [1] "part 55 written successfully."
>>>>> [1] "part 26 written successfully."
>>>>> [1] "part 37 written successfully."
>>>>> [1] "part 22 written successfully."
>>>>> [1] "part 13 written successfully."
>>>>> [1] "part 67 written successfully."
>>>>> [1] "part 10 written successfully."
>>>>> [1] "part 24 written successfully."
>>>>> [1] "part 20 written successfully."
>>>>> [1] "part 74 written successfully."
>>>>> [1] "part 50 written successfully."
>>>>> [1] "part 2 written successfully."
>>>>> [1] "part 17 written successfully."
>>>>> [1] "part 66 written successfully."
>>>>> [1] "part 61 written successfully."
>>>>> [1][1] "part 7 written successfully." "part 31 written successfully.=
> "
>>>>>
>>>>> [1] "part 70 written successfully."
>>>>> [1] "part 71 written successfully."
>>>>> [1][1] "part 76 written successfully."
>>>>> "part 42 written successfully."
>>>>> [1][1] "part 72 written successfully." "part 12 written successfully=
> =2E"
>>>>>
>>>>> [1] "part 39 written successfully."
>>>>> [1] "part 58 written successfully."
>>>>> [1] "part 87 written successfully."
>>>>> [1] "part 81 written successfully."
>>>>> [1] "part 3 written successfully."
>>>>> [1] "part 29 written successfully."
>>>>> [1] "part 82 written successfully."
>>>>> [1] "part 54 written successfully."
>>>>> [1] "part 23 written successfully."
>>>>> [1] "part 56 written successfully."
>>>>> [1] "part 73 written successfully."
>>>>> [1] "part 27 written successfully."
>>>>> [1] "part 64 written successfully."
>>>>> [1] "part 46 written successfully."
>>>>> [1] "part 80 written successfully."
>>>>> [1] "part 53 written successfully."
>>>>> [1] "part 43 written successfully."
>>>>> [1] "part 47 written successfully."
>>>>> [1] "part 57 written successfully."
>>>>> [1] "part 75 written successfully."
>>>>> [1] "part 84 written successfully."
>>>>> [1] "part 85 written successfully."
>>>>> [1][1] "part 86 written successfully."
>>>>> "part 19 written successfully."
>>>>> [1][1] "part 33 written successfully." "part 34 written successfully=
> =2E"
>>>>>
>>>>> [1] "part 21 written successfully."
>>>>> [1] "part 40 written successfully."
>>>>> [1][1] "part 4 written successfully."
>>>>> "part 28 written successfully."
>>>>> [1] "part 62 written successfully."
>>>>> [1] "part 16 written successfully."
>>>>> [1] "part 79 written successfully."
>>>>> [1] "part 6 written successfully."
>>>>> [1] "part 77 written successfully."
>>>>> [1] "part 65 written successfully."
>>>>> [1] "part 60 written successfully."
>>>>> [1] "part 78 written successfully."
>>>>> [1] "part 1 written successfully."
>>>>> [1] "part 83 written successfully."
>>>>> [1] "part 9 written successfully."
>>>>> [1] "part 15 written successfully."
>>>>> [1][1] "part 41 written successfully."
>>>>> "part 35 written successfully."
>>>>> [1][1] "part 8 written successfully." "part 69 written successfully.=
> "
>>>>>
>>>>> [1] "part 59 written successfully."
>>>>> [1] "part 25 written successfully."
>>>>> [1] "part 49 written successfully."
>>>>> [1] "part 52 written successfully."
>>>>> List of 88
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> $ : logi TRUE
>>>>> [1] "part 31 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> lapply -> FUN -> mcparallel -> send=
> Master
>>>>> [1] "part 71 written successfully."
>>>>> [1] "part 35 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 42 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 4 written successfully."
>>>>> Execution halted
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1][1] "part 30 written successfully." "part 40 written successfully=
> =2E"
>>>>>
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 41 written successfully."
>>>>> [1] "part 80 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 45 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 82 written successfully."
>>>>> [1] "part 54 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 59 written successfully."
>>>>> Execution halted
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 27 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 36 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 44 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> Execution halted
>>>>> [1] "part 83 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 61 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 70 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 66 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 10 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> Execution halted
>>>>> [1] "part 53 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 55 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 15 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 50 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 5 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> Execution halted
>>>>> [1] "part 48 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 32 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 69 written successfully."
>>>>> Execution halted
>>>>> [1] "part 52 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 77 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> Execution halted
>>>>> [1] "part 24 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 56 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 6 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 62 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 33 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 16 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 34 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 74 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 2 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 19 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> [1] "part 9 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 11 written successfully."
>>>>> [1] "part 28 written successfully."
>>>>> [1] "part 29 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 17 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 65 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> Execution halted
>>>>> Execution halted
>>>>> [1] "part 68 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 43 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 38 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 1 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 57 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 8 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1] "part 25 written successfully."
>>>>> Error in sendMaster(try(eval(expr, env), silent =3D TRUE)) :
>>>>> write error, closing pipe to the master
>>>>> Calls: lapply ... <Anonymous> -> <Anonymous> -> mcparallel -> sendMa=
> ster
>>>>> [1]List of 85
>>>>> $ : logi TRUE
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> $ : NULL
>>>>> ______________________________________________
>>>>> R-devel using r-project.org mailing list
>>>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>>>
>>>> ______________________________________________
>>>> R-devel using r-project.org mailing list
>>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>
>
>
>
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