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https://issues.apache.org/jira/browse/DAFFODIL-1908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16370227#comment-16370227
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Michael Beckerle commented on DAFFODIL-1908:
--------------------------------------------
So, if many tests are running, and even though the Daffodil schema compiler has
a big synchronized around it, a library for loading XML that both the schema
compiler uses, and other aspects of other running tests (not schema
compilation) are using that same library.
Then synchronizing the compiler doesn't help.
E.g., the schema compiler uses Xerces. Everything else uses Xerces also - e.g.,
the TDML runner to load ".tdml" files. If there was something non-thread safe
about Xerces (I'm not saying there is. I'm just using this as a plausible
example) then we would have a thread-related bug.
> Three daffodil-test sbt tests intermittently fail
> -------------------------------------------------
>
> Key: DAFFODIL-1908
> URL: https://issues.apache.org/jira/browse/DAFFODIL-1908
> Project: Daffodil
> Issue Type: Bug
> Components: Front End, TDML Runner
> Affects Versions: 2.1.0
> Reporter: Dave Thompson
> Priority: Major
> Fix For: 2.2.0
>
>
> Pulled latest updates from incubator-daffodil repository, commit
> 62eea54b75392c3fffcb36060d5bb078dfed3910.
> Thee 3 test are intermittently failing on the test machine.
> The tests passed 7 times and failed 4 (2 fail, 2 pass, 2 fail then 5 pass).
> Did a git clean after 1^st^ 2 fails.
> These tests have not failed on my VM.
> Tests and failure are below.
> [debug] Test
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_01
> started
> [error] Test
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_01
> failed: org.apache.daffodil.tdml.TDMLException: Schema Definition Error:
> Error loading schema due to org.xml.sax.SAXParseException; systemId:
> file:/home/dfdl/incubator-daffodil/daffodil-test/target/scala-2.11/test-classes/org/apache/daffodil/section06/namespaces/multi_base_09.dfdl.xsd;
> lineNumber: 1; columnNumber: 1; < expected
> [error] Schema context:
> file:/home/dfdl/incubator-daffodil/daffodil-test/target/scala-2.11/test-classes/org/apache/daffodil/section06/namespaces/multi_base_09.dfdl.xsd
> Location in file:??
> [error] Schema Definition Error: No XML Node could be loaded from
> URISchemaSource(file:/home/dfdl/incubator-daffodil/daffodil-test/target/scala-2.11/test-classes/org/apache/daffodil/section06/namespaces/multi_base_09.dfdl.xsd).
> [error] Schema context:
> file:/home/dfdl/incubator-daffodil/daffodil-test/target/scala-2.11/test-classes/org/apache/daffodil/section06/namespaces/multi_base_09.dfdl.xsd
> Location in file:??, took 0.51 sec
> [error] at
> org.apache.daffodil.tdml.ParserTestCase$$anonfun$runProcessor$2.apply(TDMLRunner.scala:663)
> [error] at
> org.apache.daffodil.tdml.ParserTestCase$$anonfun$runProcessor$2.apply(TDMLRunner.scala:663)
> [error] at scala.util.Either$LeftProjection.foreach(Either.scala:302)
> [error] at
> org.apache.daffodil.tdml.ParserTestCase.runProcessor(TDMLRunner.scala:663)
> [error] at org.apache.daffodil.tdml.TestCase.run(TDMLRunner.scala:612)
> [error] at
> org.apache.daffodil.tdml.DFDLTestSuite.runOneTestWithDataVolumes(TDMLRunner.scala:325)
> [error] at
> org.apache.daffodil.tdml.DFDLTestSuite.runOneTest(TDMLRunner.scala:313)
> [error] at
> org.apache.daffodil.tdml.Runner.runOneTest(RunnerFactory.scala:107)
> [error] at
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_01(TestNamespaces.scala:150)
> [error] ...
> [error] Caused by: Schema Definition Error: Error loading schema due to
> org.xml.sax.SAXParseException; systemId:
> file:/home/dfdl/incubator-daffodil/daffodil-test/target/scala-2.11/test-classes/org/apache/daffodil/section06/namespaces/multi_base_09.dfdl.xsd;
> lineNumber: 1; columnNumber: 1; < expected
> [error] Schema context:
> file:/home/dfdl/incubator-daffodil/daffodil-test/target/scala-2.11/test-classes/org/apache/daffodil/section06/namespaces/multi_base_09.dfdl.xsd
> Location in file:??
> [debug] Test
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_01
> finished, took 0.512 sec
>
> Also these tests:
> [debug] Test
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_02
> started
> [error] Test
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_02
> failed:
> [debug] Test
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_03
> started
> [error] Test
> org.apache.daffodil.section06.namespaces.TestNamespaces.test_multi_encoding_03
> failed:
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