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Type:
Bug
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Resolution: Gone away
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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Labels:None
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Storage 2017-05-08
Fault injection script introduced a failure in mmap while trying to create a thread:
Induced fault in following backtrace: mmap pthread_create __wt_thread_create __thread_group_resize __wt_thread_group_create __wt_evict_create __wt_connection_workers wiredtiger_open start_run start_all_runs main __libc_start_main _start
__thread_group_resize tries to error handle by destroying the thread group, which tries calling pthread_join on a non-existent thread, with a thread id of 0. Not all implementations of pthread library handle pthread_join(invalid-thread, NULL) gracefully, segfaulting with the following backtrace:
(gdb) bt #0 0x0000003e6ce084f0 in pthread_join () from /lib64/libpthread.so.0 #1 0x000000000045160f in __wt_thread_join (session=0x1121530, tid=0) at ../src/os_posix/os_thread.c:51 #2 0x000000000048fbc1 in __thread_group_shrink (session=0x1121530, group=0x1111fb8, new_count=0) at ../src/support/thread_group.c:106 #3 0x00000000004903ae in __wt_thread_group_destroy (session=0x1121530, group=0x1111fb8) at ../src/support/thread_group.c:318 #4 0x000000000049008a in __thread_group_resize (session=0x1121530, group=0x1111fb8, new_min=1, new_max=8, flags=6) at ../src/support/thread_group.c:233 #5 0x0000000000490292 in __wt_thread_group_create (session=0x1121530, group=0x1111fb8, name=0x54972a "eviction-server", min=1, max=8, flags=6, chk_func=0x42ec20 <__wt_evict_thread_chk>, run_func=0x42ec3f <__wt_evict_thread_run>, stop_func=0x42ee5e <__wt_evict_thread_stop>) at ../src/support/thread_group.c:291 #6 0x000000000042f165 in __wt_evict_create (session=0x1121530) at ../src/evict/evict_lru.c:492 #7 0x00000000004211d5 in __wt_connection_workers (session=0x1121530, cfg=0x7ffc17548870) at ../src/conn/conn_open.c:261 #8 0x0000000000419103 in wiredtiger_open (home=0x1108040 "WT_TEST", event_handler=0x0, config=0x1108590 "create,cache_size=1G", wt_connp=0x7ffc17548b50) at ../src/conn/conn_api.c:2457 #9 0x000000000040bf31 in start_run (wtperf=0x7ffc17548b20) at ../../../bench/wtperf/wtperf.c:2261 #10 0x000000000040bb1b in start_all_runs (wtperf=0x7ffc17548b20) at ../../../bench/wtperf/wtperf.c:2175 #11 0x000000000040d6e9 in main (argc=5, argv=0x7ffc17548db8) at ../../../bench/wtperf/wtperf.c:2712 (gdb) f 2 #2 0x000000000048fbc1 in __thread_group_shrink (session=0x1121530, group=0x1111fb8, new_count=0) at ../src/support/thread_group.c:106 106 WT_TRET(__wt_thread_join(session, thread->tid)); (gdb) p thread->tid $1 = 0 (gdb) f 1 #1 0x000000000045160f in __wt_thread_join (session=0x1121530, tid=0) at ../src/os_posix/os_thread.c:51 51 ret = pthread_join(tid, NULL); (gdb) p tid $2 = 0