[IMPALA-9267] Impala hits DCHECK in ClientRequestState due to invalid state transition

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 3.4.0
• Fix Version/s: Impala 3.4.0
• Component/s: Backend
• Labels: broken-build
• Epic Color: ghx-label-10
• Assignee: Sahil Takiar
• Reporter: Joe McDonnell
• Created: 28/Dec/19 00:09
• Updated: 13/Jan/20 22:45
• Resolved: 13/Jan/20 22:45

Description

Some test runs see the coordinator Impalad hit this DCHECK:

case ExecState::FINISHED:
  // A query can transition from PENDING to FINISHED if it is cancelled by the
  // client.
  DCHECK(old_state == ExecState::PENDING || old_state == ExecState::RUNNING)
      << Substitute(
          error_msg, ExecStateToString(old_state), ExecStateToString(new_state));
  UpdateExecState(new_state);
  break;

The error message is:

F1222 23:01:14.020613 10494 client-request-state.cc:951] Check failed: old_state == ExecState::PENDING || old_state == ExecState::RUNNING Illegal state transition: ERROR -> FINISHED

This happened on one exhaustive run on Centos6 and an s3 run. There doesn't seem to be a pattern, so I'm assuming this is a generic issue.

Issue Links

• is caused by: IMPALA-6894 Use an internal representation of query states in ClientRequestState