[teiid-issues] [JBoss JIRA] (TEIID-4130) Prevent blocked exceptions from being thrown in AccessNode open

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-4130:
-------------------------------------

             Summary: Prevent blocked exceptions from being thrown in AccessNode open
                 Key: TEIID-4130
                 URL: https://issues.jboss.org/browse/TEIID-4130
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
    Affects Versions: 8.7
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins
             Fix For: 9.0, 8.12.5, 8.13.4


Having the access node block in open can lead to unintended consequences in parent nodes.  For example with tuplesource caching it can create additional tuplesource instances such the cached source is closed prematurely (as it thinks that all readers have been satisfied).  This results in exceptions similar to:

TEIID30019 Unexpected exception for request 2TLgULsEBZvO.8: java.lang.AssertionError: ASSERTION FAILED: expected reference to be not null
...
	at org.teiid.common.buffer.TupleBuffer.getBatch(TupleBuffer.java:286) \[teiid-engine-8.7.5.6_2-redhat-1.jar:8.7.5.6_2-redhat-1]
	at org.teiid.dqp.internal.process.TupleSourceCache$CopyOnReadTupleSource.nextTuple(TupleSourceCache.java:103) \[teiid-engine-8.7.5.6_2-redhat-1.jar:8.7.5.6_2-redhat-1]
...



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