Todd Lipcon created KUDU-1992:
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Summary: heap-use-after-free when running threadlocal cache
destructor
Key: KUDU-1992
URL: https://issues.apache.org/jira/browse/KUDU-1992
Project: Kudu
Issue Type: Bug
Components: cfile, util
Affects Versions: 1.4.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Blocker
After KUDU-680, we started to see the occasional heap-use-after-free when
destructing the new thread-local cache. The issue seems to be:
- the thread uses LongAdder somewhere, which allocates a threadlocal 'struct
HashCode'
- the thread also uses the threadlocal block cache
On thread destruction, we are running the LongAdder HashCode destructor first,
and then running the threadlocal cache destructor. The threadlocal cache runs
'Release()' on the cached blocks, which tries to update the cache's
LongAdder-based metrics. This then accesses the hashcode threadlocal which has
already been destructed.
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