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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: 1.3.5
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Component/s: Bulk API
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Labels:None
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Environment:Debian Jessie with libc 2.19-18+deb8
On a multithread client, I have a segfault with bulk operations.
In the stacktrace, you can see that the problem happens when mongoc client call the gethostbyname method in libc.
#0 0x00007ffff744b833 in _IO_un_link () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007ffff743f775 in fclose () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007ffff2072f11 in _nss_files_gethostbyname3_r ()
from /lib/x86_64-linux-gnu/libnss_files.so.2
#3 0x00007ffff2073524 in _nss_files_gethostbyname2_r ()
from /lib/x86_64-linux-gnu/libnss_files.so.2
#4 0x00007ffff74cfe39 in gethostbyname2_r ()
from /lib/x86_64-linux-gnu/libc.so.6
#5 0x00007ffff74aa4bf in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#6 0x00007ffff74abafd in getaddrinfo () from /lib/x86_64-linux-gnu/libc.so.6
#7 0x00007ffff62f0617 in mongoc_client_connect_tcp (uri=0x7ffff777d780,
uri@entry=0x7fffe4000a80, host=0x7fffe40031c8, error=0x7ffff2a7ac40)
at src/mongoc/mongoc-client.c:118
#8 0x00007ffff62f0a36 in mongoc_client_default_stream_initiator (
uri=0x7fffe4000a80, host=0x7fffe40031c8, user_data=0x7fffe4000950,
error=0x7ffff2a7ac40) at src/mongoc/mongoc-client.c:310
#9 0x00007ffff62f5014 in _mongoc_cluster_add_node (error=0x7ffff2a7ac40,
sd=0x7fffe40031c0, cluster=0x7fffe4000968)
at src/mongoc/mongoc-cluster.c:1285
#10 mongoc_cluster_fetch_stream_pooled (error=0x7ffff2a7ac40,
reconnect_ok=true, sd=0x7fffe40031c0, cluster=0x7fffe4000968)
at src/mongoc/mongoc-cluster.c:1563
#11 _mongoc_cluster_stream_for_server_description (
cluster=cluster@entry=0x7fffe4000968, sd=sd@entry=0x7fffe40031c0,
reconnect_ok=reconnect_ok@entry=true, error=error@entry=0x7ffff2a7ac40)
at src/mongoc/mongoc-cluster.c:1365
#12 0x00007ffff62f561d in _mongoc_cluster_stream_for_optype (
cluster=0x7fffe4000968, optype=<optimized out>,
read_prefs=<optimized out>, error=0x7ffff2a7ac40)
at src/mongoc/mongoc-cluster.c:1701
#13 0x00007ffff62ef954 in mongoc_bulk_operation_execute (bulk=0x7fffe40028c0,
reply=0x35000002, reply@entry=0x7fffe40008c0, error=0x1d621,
error@entry=0x7ffff2a7ac40) at src/mongoc/mongoc-bulk-operation.c:427
In the doc, the getaddrinfo is described as "Thread safety".
Do you think that is a problem in mongoc driver or in the libc ?