[jira] [Created] (CASSANDRA-7626) Tracing problems with 2.1 cqlsh

["Tyler Hobbs (JIRA)" <ji...@apache.org>]

Tyler Hobbs created CASSANDRA-7626:
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             Summary: Tracing problems with 2.1 cqlsh
                 Key: CASSANDRA-7626
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7626
             Project: Cassandra
          Issue Type: Bug
          Components: Tools
            Reporter: Tyler Hobbs
            Assignee: Tyler Hobbs
            Priority: Minor
             Fix For: 2.1.0


If some replicas continue doing work after the coordinator responds to the client (e.g. writing at CL.ONE with RF=3), those trace events will not have a source_elapsed field, leading to the following error in cqlsh:

{noformat}


Traceback (most recent call last):
  File "bin/cqlsh", line 822, in onecmd
    self.handle_statement(st, statementtext)
  File "bin/cqlsh", line 863, in handle_statement
    return self.perform_statement(cqlruleset.cql_extract_orig(tokens, srcstr))
  File "bin/cqlsh", line 898, in perform_statement
    print_trace_session(self, self.session, stmt.trace.trace_id)
  File "/srv/cassandra/bin/../pylib/cqlshlib/tracing.py", line 25, in print_trace_session
    rows = fetch_trace_session(trace)
  File "/srv/cassandra/bin/../pylib/cqlshlib/tracing.py", line 54, in fetch_trace_session
    event.source_elapsed.microseconds])
AttributeError: 'NoneType' object has no attribute 'microseconds'
{noformat}

If the trace wasn't fully written within the driver's 2 second waiting period, you'll get this error:
{noformat}
Traceback (most recent call last):
  File "bin/cqlsh", line 822, in onecmd
    self.handle_statement(st, statementtext)
  File "bin/cqlsh", line 863, in handle_statement
    return self.perform_statement(cqlruleset.cql_extract_orig(tokens, srcstr))
  File "bin/cqlsh", line 898, in perform_statement
    print_trace_session(self, self.session, stmt.trace.trace_id)
AttributeError: 'NoneType' object has no attribute 'trace_id'
{noformat}



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