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Posted to issues-all@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2023/04/24 00:36:00 UTC
[jira] [Resolved] (IMPALA-12079) NoneType object is not iterable due to uncaught exceptions
[ https://issues.apache.org/jira/browse/IMPALA-12079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Quanlong Huang resolved IMPALA-12079.
-------------------------------------
Fix Version/s: Impala 4.3.0
Target Version: Impala 4.1.3
Resolution: Fixed
> NoneType object is not iterable due to uncaught exceptions
> ----------------------------------------------------------
>
> Key: IMPALA-12079
> URL: https://issues.apache.org/jira/browse/IMPALA-12079
> Project: IMPALA
> Issue Type: Bug
> Components: Clients
> Reporter: Quanlong Huang
> Assignee: Quanlong Huang
> Priority: Critical
> Fix For: Impala 4.3.0
>
>
> We saw impala-shell crashed with the following error:
> {code:python}
> Query: ALTER table xxx recover partitions
> Unknown Exception : 'NoneType' object is not iterable
> Traceback (most recent call last):
> File "/cs/cloudera/opt/cloudera/parcels/CDH-7.1.7-1.cdh7.1.7.p1055.31529794/bin/../lib/impala-shell/impala_shell.py", line 1131, in _execute_stmt
> query_str, self.set_query_options)
> File "/cs/cloudera/opt/cloudera/parcels/CDH-7.1.7-1.cdh7.1.7.p1055.31529794/lib/impala-shell/lib/impala_client.py", line 1069, in execute_query
> handle, rpc_status = self._do_beeswax_rpc(lambda: self.imp_service.query(query))
> TypeError: 'NoneType' object is not iterable {code}
> After adding some logs in "_do_beeswax_rpc()", we found it's due to an uncaught exception:
> {code:python}
> <class 'socket.error'> [Errno 104] Connection reset by peer{code}
> Here is a code sniper (after adding the debug log) of impala_client.py:
> {code:python}
> def _do_beeswax_rpc(self, rpc, suppress_error_on_cancel=True):
> ...
> except Exception as e:
> ...
> print(type(e), str(e)) # Added this debug log
> if suppress_error_on_cancel and self.is_query_cancelled:
> raise QueryCancelledByShellException()
> else:
> if "BeeswaxException" in str(e):
> raise RPCException("ERROR: %s" % e.message)
> if "QueryNotFoundException" in str(e):
> raise QueryStateException('Error: Stale query handle')
> # The exception doesn't match any cases above so the method returns None{code}
> Unfortunately, I can't reproduce this in house and we didn't get chance to dig into where the exception come from. We should fix impala-shell anyway to expose the exception instead of returning None and crashing itself.
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