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https://issues.apache.org/jira/browse/TS-2594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941291#comment-13941291
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Alan M. Carroll commented on TS-2594:
-------------------------------------
Still tracking this down. What I have found so far is that there is a specific
object for Phil's deployment that breaks. The direct cause of the failure is
that one of the slot accelerator values is wrong - it should be 0xc, but it is
0x5. The values in the bad slot (5) point to bogus memory but not too far from
alid memory. It seems quite possible that we have a problem involving a heap
re-allocation that doesn't quite update everything correctly and is then
written out in the damaged state. In this case the presumption is that the
values in slot 5 were correct but are no longer, with the correct values in
slot 12 but the accelerator table was not updated to reflect this. I have
copies of the memory for the live object and for it serialized form on disk
that I will examine to verify the data on the disk is bad. I need a bit more
data before I can started figuring out how things became corrupted.
> Segmentation fault for 4.2.0-rc0
> --------------------------------
>
> Key: TS-2594
> URL: https://issues.apache.org/jira/browse/TS-2594
> Project: Traffic Server
> Issue Type: Bug
> Affects Versions: 4.2.0
> Reporter: bettydramit
> Labels: crash
> Fix For: 4.2.0, 5.0.0
>
>
> {code}
> [E. Mgmt] log ==> [TrafficManager] using root directory '/usr'
> [TrafficServer] using root directory '/usr'
> NOTE: Traffic Server received Sig 11: Segmentation fault
> /usr/bin/traffic_server - STACK TRACE:
> /lib64/libpthread.so.0(+0xf70f)[0x2b4e95ab670f]
> /lib64/libc.so.6(memcpy+0xe)[0x2b4e96a4595e]
> /usr/lib64/trafficserver/libtsutil.so.4(StrList::_new_cell(char const*,
> int)+0xef)[0x2b4e939ac88f]
> /usr/bin/traffic_server(StrList::new_cell(char const*, int)+0x9f)[0x5ff919]
> /usr/bin/traffic_server(StrList::append_string(char const*,
> int)+0x28)[0x5ff9ce]
> /usr/bin/traffic_server(mime_field_value_get_comma_list(MIMEField*,
> StrList*)+0x51)[0x602a39]
> /usr/bin/traffic_server(MIMEField::value_get_comma_list(StrList*)+0x22)[0x551052]
> /usr/bin/traffic_server(MIMEHdr::value_get_comma_list(char const*, int,
> StrList*)+0x4a)[0x5510a0]
> /usr/bin/traffic_server(HttpTransactCache::CalcVariability(CacheLookupHttpConfig*,
> HTTPHdr*, HTTPHdr*, HTTPHdr*)+0xab)[0x5a3399]
> /usr/bin/traffic_server(HttpTransactCache::calculate_quality_of_match(CacheLookupHttpConfig*,
> HTTPHdr*, HTTPHdr*, HTTPHdr*)+0xc68)[0x5a19b0]
> /usr/bin/traffic_server(HttpTransactCache::SelectFromAlternates(CacheHTTPInfoVector*,
> HTTPHdr*, CacheLookupHttpConfig*)+0x28c)[0x5a0a7e]
> /usr/bin/traffic_server(CacheVC::openReadStartHead(int,
> Event*)+0x5f2)[0x68e590]
> /usr/bin/traffic_server(Continuation::handleEvent(int, void*)+0x6b)[0x4e7137]
> /usr/bin/traffic_server(CacheVC::handleReadDone(int, Event*)+0x1127)[0x66bfa9]
> /usr/bin/traffic_server(Continuation::handleEvent(int, void*)+0x6b)[0x4e7137]
> /usr/bin/traffic_server(AIOCallbackInternal::io_complete(int,
> void*)+0x3b)[0x671371]
> /usr/bin/traffic_server(Continuation::handleEvent(int, void*)+0x6b)[0x4e7137]
> /usr/bin/traffic_server(EThread::process_event(Event*, int)+0xc7)[0x6d9165]
> /usr/bin/traffic_server(EThread::execute()+0x9f)[0x6d9333]
> /usr/bin/traffic_server(main+0x122f)[0x50e634]
> /lib64/libc.so.6(__libc_start_main+0xfc)[0x2b4e969dad1c]
> /usr/bin/traffic_server[0x4ca098]
> {code}
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