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https://issues.apache.org/jira/browse/TS-4840?focusedWorklogId=28960&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-28960
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ASF GitHub Bot logged work on TS-4840:
--------------------------------------
Author: ASF GitHub Bot
Created on: 13/Sep/16 17:24
Start Date: 13/Sep/16 17:24
Worklog Time Spent: 10m
Work Description: Github user atsci commented on the issue:
https://github.com/apache/trafficserver/pull/1012
Linux build *successful*! See
https://ci.trafficserver.apache.org/job/Github-Linux/686/ for details.
Issue Time Tracking
-------------------
Worklog Id: (was: 28960)
Time Spent: 0.5h (was: 20m)
> Crash when reattaching to C++ API Stats.
> ----------------------------------------
>
> Key: TS-4840
> URL: https://issues.apache.org/jira/browse/TS-4840
> Project: Traffic Server
> Issue Type: Bug
> Components: CPP API, Metrics
> Affects Versions: 7.0.0
> Reporter: James Peach
> Assignee: James Peach
> Priority: Blocker
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> {noformat}
> Program received signal SIGSEGV, Segmentation fault.
> 0x00000000007f733c in ink_atomic_swap<long> (mem=0x0, value=1) at
> ../../lib/ts/ink_atomic.h:76
> 76 return __sync_lock_test_and_set(mem, value);
> (gdb) where
> #0 0x00000000007f733c in ink_atomic_swap<long> (mem=0x0, value=1) at
> ../../lib/ts/ink_atomic.h:76
> #1 0x00000000007f6e56 in RecSetGlobalRawStatSum (rsb=0x2f16290, id=6,
> data=1) at RecRawStats.cc:482
> #2 0x00000000005372c9 in TSStatIntSet (the_stat=6, value=1) at InkAPI.cc:6944
> #3 0x00002ae6d3398bb1 in atscppapi::Stat::set (this=0x2ae6d37c2890 <...>,
> value=1) at Stat.cc:78
> #4 0x00002ae6d35bb826 in TSPluginInit (argc=1, argv=0x7ffd0613bfe0) at
> /home/jpeach/n/....cc:753
> #5 0x00000000005550e5 in plugin_load (argc=1, argv=0x7ffd0613bfe0,
> validateOnly=false) at Plugin.cc:137
> {noformat}
> The change in TS-4793 regressed the C++ API Stat object. What happens is that
> if you restart {{traffic_server}} without {{traffic_manager}}, the
> {{TSStatFindName}} call finds the metric in the records hash table, but
> {{traffic_server}} has not set up the RSB entry so actually incrementing it
> crashes.
> If you call {{TSStatCreate}} twice for the same metric, you will end up with
> multiple RSB slots being consumed which is almost as bad.
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