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https://issues.apache.org/jira/browse/TS-3304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14286205#comment-14286205
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Leif Hedstrom commented on TS-3304:
-----------------------------------
I think it's ok for a 4.2.x back port. I still there's more work to be done
here, maybe clone this Jira and assign to amc ?
[~smalenfant] Thanks for the detailed reports, that certainly makes a lot of
sense (the 86400 TTL on localhost is standard I think). Does [~psudaemon]'s fix
solve your problem? You are not using log collation are you ?
> segfault in libtsutils
> ----------------------
>
> Key: TS-3304
> URL: https://issues.apache.org/jira/browse/TS-3304
> Project: Traffic Server
> Issue Type: Bug
> Components: HostDB
> Reporter: Steve Malenfant
> Assignee: Leif Hedstrom
> Fix For: 5.3.0
>
>
> Getting multiple segfaults per day on 4.2.1.
> [4324544.324222] [ET_NET 23][10504]: segfault at 0 ip 00002acd66546168 sp
> 00002acd71f190b8 error 4 in libtsutil.so.4.2.1[2acd66521000+34000]
> [4410696.820857] [ET_NET 19][22738]: segfault at 0 ip 00002af09f339168 sp
> 00002af0aa9230b8 error 4 in libtsutil.so.4.2.1[2af09f314000+34000]
> [4497039.474253] [ET_NET 12][34872]: segfault at 0 ip 00002ad17e6a1168 sp
> 00002ad1896100b8 error 4 in libtsutil.so.4.2.1[2ad17e67c000+34000]
> [4583372.073916] [ET_NET 3][46994]: segfault at 0 ip 00002aced4227168 sp
> 00002aceda7d80b8 error 4 in libtsutil.so.4.2.1[2aced4202000+34000]
> [4756046.944373] [ET_NET 22][10799]: segfault at 0 ip 00002b1771f76168 sp
> 00002b177d9130b8 error 4 in libtsutil.so.4.2.1[2b1771f51000+34000]
> Stack Trace :
> (gdb) bt
> #0 ink_inet_addr (s=<value optimized out>) at ink_inet.cc:107
> #1 0x00000000005e0df5 in is_dotted_form_hostname (mutex=0x1d32cb0, md5=...,
> ignore_timeout=false) at P_HostDBProcessor.h:545
> #2 probe (mutex=0x1d32cb0, md5=..., ignore_timeout=false) at HostDB.cc:668
> #3 0x00000000005e2b34 in HostDBProcessor::getby (this=<value optimized out>,
> cont=0x2b514cc749d0, hostname=0x0, len=<value optimized out>,
> ip=0x2b50e8f092b0, aforce_dns=false, host_res_style=HOST_RES_NONE,
> dns_lookup_timeout=0)
> at HostDB.cc:772
> #4 0x0000000000517f2c in getbyaddr_re (this=0x2b514cc749d0) at
> ../../iocore/hostdb/I_HostDBProcessor.h:417
> #5 HttpSM::do_hostdb_reverse_lookup (this=0x2b514cc749d0) at HttpSM.cc:3968
> #6 0x000000000052f028 in HttpSM::set_next_state (this=0x2b514cc749d0) at
> HttpSM.cc:6932
> #7 0x0000000000518242 in HttpSM::do_hostdb_lookup (this=0x2b514cc749d0) at
> HttpSM.cc:3950
> #8 0x000000000052f44a in HttpSM::set_next_state (this=0x2b514cc749d0) at
> HttpSM.cc:6925
> #9 0x00000000005284fa in HttpSM::handle_api_return (this=0x2b514cc749d0) at
> HttpSM.cc:1559
> #10 0x000000000052ea9a in HttpSM::set_next_state (this=0x2b514cc749d0) at
> HttpSM.cc:6825
> #11 0x000000000052ea8a in HttpSM::set_next_state (this=0x2b514cc749d0) at
> HttpSM.cc:7224
> #12 0x00000000005284fa in HttpSM::handle_api_return (this=0x2b514cc749d0) at
> HttpSM.cc:1559
> #13 0x000000000052ea9a in HttpSM::set_next_state (this=0x2b514cc749d0) at
> HttpSM.cc:6825
> #14 0x00000000005284fa in HttpSM::handle_api_return (this=0x2b514cc749d0) at
> HttpSM.cc:1559
> #15 0x000000000052ea9a in HttpSM::set_next_state (this=0x2b514cc749d0) at
> HttpSM.cc:6825
> #16 0x000000000052fef6 in HttpSM::state_read_client_request_header
> (this=0x2b514cc749d0, event=100, data=<value optimized out>) at HttpSM.cc:821
> #17 0x000000000052a5b8 in HttpSM::main_handler (this=0x2b514cc749d0,
> event=100, data=0x2b514802ca08) at HttpSM.cc:2539
> #18 0x000000000068793b in handleEvent (event=<value optimized out>,
> vc=0x2b514802c900) at ../../iocore/eventsystem/I_Continuation.h:146
> #19 read_signal_and_update (event=<value optimized out>, vc=0x2b514802c900)
> at UnixNetVConnection.cc:138
> #20 0x0000000000689ec4 in read_from_net (nh=0x2b50e2e17c10,
> vc=0x2b514802c900, thread=<value optimized out>) at UnixNetVConnection.cc:320
> #21 0x000000000067fb12 in NetHandler::mainNetEvent (this=0x2b50e2e17c10,
> event=<value optimized out>, e=<value optimized out>) at UnixNet.cc:384
> #22 0x00000000006ac8cf in handleEvent (this=0x2b50e2e14010, e=0x1a9ef30,
> calling_code=5) at I_Continuation.h:146
> #23 EThread::process_event (this=0x2b50e2e14010, e=0x1a9ef30, calling_code=5)
> at UnixEThread.cc:145
> #24 0x00000000006ad273 in EThread::execute (this=0x2b50e2e14010) at
> UnixEThread.cc:269
> #25 0x00000000006abc2a in spawn_thread_internal (a=0x198f820) at Thread.cc:88
> #26 0x00002b50e026b9d1 in start_thread () from /lib64/libpthread.so.0
> #27 0x000000381b2e8b6d in clone () from /lib64/libc.so.6
>
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