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https://issues.apache.org/jira/browse/DERBY-6704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14097982#comment-14097982
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Dag H. Wanvik edited comment on DERBY-6704 at 8/15/14 12:43 AM:
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Uploading version b of this diagnostics patch. This version will also
try to get a jstack status of the hanging subprocess before killing it (only
works on Unixen) - hopefully this would work also on MacOs; it uses a little
dirty reflection to access a private PID field in the underlying Process class
object before trying a jstack. For this to work, the test must also run using a
JDK, a JRE doesn't have a jstack.
was (Author: dagw):
Uploading version b of this diagnostics patch. This version will also
try to get a jstack status of the hanging subprocess before killing it (only
works on Unixen) - hopefully this would work also on MacOs; it uses a little
dirty reflection to access a private PID field in the underlying Process class
object befoer trying a jstack. For this to work, the test must also run using a
JDK, a JRE doesn't have a jstack.
> Hang in AutoloadTest.spawnProcess:JDBCDriversEmbeddedTest on Mac/jdk7,8
> -----------------------------------------------------------------------
>
> Key: DERBY-6704
> URL: https://issues.apache.org/jira/browse/DERBY-6704
> Project: Derby
> Issue Type: Bug
> Reporter: Dag H. Wanvik
> Attachments: derby-6704.diff, derby-6704b.diff, derby-6704b.status
>
>
> In our release tests for 10.11 we have seen this stack trace:
> {code}
>
> org.apache.derbyTesting.functionTests.tests.jdbcapi.AutoloadTest.spawnProcess:JDBCDriversEmbeddedTest
> 2701.548 s
> junit.framework.AssertionFailedError: Test process failed:Spawned
> org.apache.derbyTesting.functionTests.tests.jdbcapi.JDBCDriversEmbeddedTest
> exitCode=143
> STDOUT:
> ..
> at
> org.apache.derbyTesting.functionTests.tests.jdbcapi.AutoloadTest.spawnProcess(AutoloadTest.java:256)
> at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:118)
> at
> org.apache.derbyTesting.junit.BaseJDBCTestCase.runBareOverridable(BaseJDBCTestCase.java:440)
> at
> org.apache.derbyTesting.junit.BaseJDBCTestCase.runBare(BaseJDBCTestCase.java:457)
> at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> at junit.extensions.TestSetup.run(TestSetup.java:25)
> {code}
> presumably because the spawned process is killed by the test framework; it
> had been executing for 2701 second, but we don't have much insight into what
> happened to the subprocess because we don't collect its std our or std err.
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