Details
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Bug
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Resolution: Unresolved
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Major
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None
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3.0.6
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None
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application backends in Amadeus using libcouchbase 3.0.6 towards Couchbase server 6.0.4
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1
Description
Hi Sergey, Couchbase team,
Amadeus Availability Process Engine application is encountered some core dump on a few backends (2-5 instances over 2200 in total) while doing kernel patching on a node, basically starting with a graceful failover of the node. It appears currenlty with libcouchbase 3.0.6 and towards Couchbase server 6.0.4. Troughput for all backend is approxymately 1M req/s with elapsed time median to 800us.
Have you already seen this kind of issues ?
From the stack trace below, it appears that during the graceful failover, libcouchbase may rarely core while performing a multiget operation and attempting to update vbucket map with new cluster topology:
#1 0x00007f19f5a8064a in __GI_abort () at abort.c:89 |
save_stage = 2 |
act = {__sigaction_handler = {sa_handler = 0x541dcb0, sa_sigaction = 0x541dcb0}, sa_mask = {__val = {146498816, 139749460973088, 139749116680179, 0, 206158430256, 3087494, 874396, 139749460973056, 139749208745152, 167560320, 139749470174842, 139749460973120, 1, 139749460973072, 139749470174935, 139749460973072}}, sa_flags = -175702233, sa_restorer = 0x7f19f4fa9640} |
sigs = {__val = {32, 0 <repeats 15 times>}} |
#2 0x00007f19f5870665 in tcmalloc::Log(tcmalloc::LogMode, char const*, int, tcmalloc::LogItem, tcmalloc::LogItem, tcmalloc::LogItem, tcmalloc::LogItem) () from /ama/obe/PRD/ape/odc/pack/OSP/lib/libtcmalloc.so.4 |
No symbol table info available.
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#3 0x00007f19f586780a in (anonymous namespace)::InvalidFree(void*) [clone .lto_priv.197] () from /ama/obe/PRD/ape/odc/pack/OSP/lib/libtcmalloc.so.4 |
No symbol table info available.
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#4 0x00007f19e5f0c43b in lcbvb_destroy () from /ama/obe/PRD/ape/odc/pack/MDW/lib/libkvclient.so.16.1.0 |
No symbol table info available.
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#5 0x00007f19e5f60276 in lcb_update_vbconfig () from /ama/obe/PRD/ape/odc/pack/MDW/lib/libkvclient.so.16.1.0 |
No symbol table info available.
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#6 0x00007f19e5f3a6b4 in lcb::io::Timer<lcb::Bootstrap, &lcb::Bootstrap::timer_dispatch>::cb(void*) () from /ama/obe/PRD/ape/odc/pack/MDW/lib/libkvclient.so.16.1.0 |
No symbol table info available.
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#7 0x00007f19e5f1e4ec in timer_callback () from /ama/obe/PRD/ape/odc/pack/MDW/lib/libkvclient.so.16.1.0 |
No symbol table info available.
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#8 0x00007f19e073bf09 in event_base_loop () from /ama/obe/PRD/ape/odc/pack/OSP/lib/libevent-2.0.so.5 |
No symbol table info available.
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#9 0x00007f19e5fad322 in lcb_wait () from /ama/obe/PRD/ape/odc/pack/MDW/lib/libkvclient.so.16.1.0 |
Regards,
Alexis Deltour.
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