ztest: missing log records: claimed 9 < committed 70 after ztest_dataset_open during clone #5527

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jsalinasintel opened this Issue Dec 23, 2016 · 0 comments

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@jsalinasintel

Version Information

Distribution Name Centos 7.2
Distribution Version 7.2
Linux Kernel 3.10.0-327.36.3.el7.x86_64
Architecture x86_64
ZFS Version master Dec 20th RPM/modinfo say: 0.7.0-rc2
SPL Version master Dec 20th RPM/modinfo say: 0.7.0-rc2
Git Build Data Revision: a3823f4
refs/remotes/origin/master
Built Branches refs/remotes/origin/master: Build #186 of Revision a3823f4 (refs/remotes/origin/master)

Problem

Running zloop we hit an issue:
ztest: missing log records: claimed 9 < committed 70
/usr/sbin/ztest[0x40a7cf]
/lib64/libpthread.so.0(+0xf100)[0x7f78093b0100]
/lib64/libc.so.6(gsignal+0x37)[0x7f78090145f7]
/lib64/libc.so.6(abort+0x148)[0x7f7809015ce8]

Reproduce

/sbin/ztest -VVVVV -m 0 -r 0 -R 2 -v 4 -a 12 -T 30 -P 16 -s 128m -f /var/tmp

This one is not as common as the others but we hit a flurry of them last night

Log detail

ztest.out

starting main threads...
ztest: missing log records: claimed 9 < committed 70
/usr/sbin/ztest[0x40a7cf]
/lib64/libpthread.so.0(+0xf100)[0x7f78093b0100]
/lib64/libc.so.6(gsignal+0x37)[0x7f78090145f7]
/lib64/libc.so.6(abort+0x148)[0x7f7809015ce8]
/usr/sbin/ztest[0x408b7d]
/usr/sbin/ztest[0x4068d5]
/usr/sbin/ztest[0x40771e]
/usr/sbin/ztest[0x4087e4]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f7809000b15]
/usr/sbin/ztest[0x4088cd]
child died with signal 6

status

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/sbin/ztest'.
Program terminated with signal 6, Aborted.
#0  0x00007f78090145f7 in raise () from /lib64/libc.so.6
*
* Backtrace 
*
#0  0x00007f78090145f7 in raise () from /lib64/libc.so.6
#1  0x00007f7809015ce8 in abort () from /lib64/libc.so.6
#2  0x0000000000408b7d in fatal ()
#3  0x00000000004068d5 in ztest_dataset_open ()
#4  0x000000000040771e in ztest_run ()
#5  0x00000000004087e4 in main ()

Thread 716 (Thread 0x7f7773a69700 (LWP 138388)):
#0  0x00007f78090cb69d in poll () from /lib64/libc.so.6
#1  0x000000000040c13e in ztest_resume_thread ()
#2  0x00007f780a5a496c in zk_thread_helper () from /lib64/libzpool.so.2
#3  0x00007f78093a8dc5 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f78090d5ced in clone () from /lib64/libc.so.6
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