[jira] [Created] (DAFFODIL-2626) Circular deadlock when computing stored length around prefixed-length elements

["Mike Beckerle (Jira)" <ji...@apache.org>]

Mike Beckerle created DAFFODIL-2626:
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             Summary: Circular deadlock when computing stored length around prefixed-length elements
                 Key: DAFFODIL-2626
                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2626
             Project: Daffodil
          Issue Type: Bug
          Components: Back End
    Affects Versions: 3.2.1
            Reporter: Mike Beckerle


I have a small schema with a messageLength element as the first element, which has outputValueCalc on the message payload.

The message payload contains prefixed-length strings.

I get a deadlock on unparsing:
{code}
org.apache.daffodil.tdml.TDMLExceptionImpl: (Implementation: daffodil) SuspensionDeadlockException: Runtime Schema Definition Error: Expressions/Unparsers are circularly deadlocked (mutually defined):
 - SimpleTypeRetryUnparserSuspendableOperation for messageLength
 - ElementUnusedUnparserSuspendableOperation for payload
 - AlignmentFillUnparserSuspendableOperation for address
Schema context: messageLength Location line 59 column 18 in file:/tmp/s__3044777217024912267.dfdl.xsd
Data location was preceding byte 0
{code}

See test test_computedLengthAroundPrefixedLengths1u

Test test_computedLengthAroundPrefixedLengths1p is the same thing, just testing the parse direction.



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