Csaba Ringhofer created IMPALA-14881:
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Summary: Scanner threads can have incorrect instance id with
mt_dop=0
Key: IMPALA-14881
URL: https://issues.apache.org/jira/browse/IMPALA-14881
Project: IMPALA
Issue Type: Bug
Components: Backend
Reporter: Csaba Ringhofer
IMPALA-6416 added automatic setting of instance id based on parent thread, but
for scanner threads the parent thread can belong to an unrelated thread that
releases a thread token.
The problematic change:
https://gerrit.cloudera.org/#/c/9053/9/be/src/exec/hdfs-scan-node.cc
ThreadTokenAvailableCb can be called from outside the instance through as it is
registered in ThreadResourcePool::AddThreadAvailableCb
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