[teiid-issues] [JBoss JIRA] (TEIID-4466) Inconsistent synchronization around odbc sync handling

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-4466:
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             Summary: Inconsistent synchronization around odbc sync handling
                 Key: TEIID-4466
                 URL: https://issues.jboss.org/browse/TEIID-4466
             Project: Teiid
          Issue Type: Bug
          Components: ODBC
    Affects Versions: 7.7
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins
             Fix For: 9.1, 9.0


There is a narrow race condition when an odbc message is followed by sync - the isExecuting check is supposed to prevent the sync until the execution is complete, but is not synchronized.

The result can be an exception in the pg client:

java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
	at java.util.ArrayList.get(ArrayList.java:429)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1825)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)

As the pendingExecuteQueue will have been cleared by the early response to sync.



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