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https://issues.apache.org/jira/browse/CALCITE-687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14737758#comment-14737758
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Julian Hyde commented on CALCITE-687:
-------------------------------------
How about using a java.util.concurrent.locks.Lock to manage access to the
hsqldb? Tests that require it could use try ... finally. Later we might be able
to downgrade some tests to just a read lock, so they can run in parallel with
other read tests.
> Make RemoteDriverTest thread-safe
> ---------------------------------
>
> Key: CALCITE-687
> URL: https://issues.apache.org/jira/browse/CALCITE-687
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Reporter: Julian Hyde
> Assignee: Nick Dimiduk
> Fix For: next
>
>
> There is apparently a thread safety issue in
> RemoteDriverTest.testStatementLifecycle. Here is output from <a
> href="https://travis-ci.org/julianhyde/incubator-calcite/jobs/58869949">Travis</a>:{code}ests
> run: 18, Failures: 1, Errors: 0, Skipped: 4, Time elapsed: 29.008 sec <<<
> FAILURE! - in org.apache.calcite.avatica.RemoteDriverTest
> testStatementLifecycle(org.apache.calcite.avatica.RemoteDriverTest) Time
> elapsed: 1.807 sec <<< FAILURE!
> java.lang.AssertionError: expected:<1> but was:<9>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:743)
> at org.junit.Assert.assertEquals(Assert.java:118)
> at org.junit.Assert.assertEquals(Assert.java:555)
> at org.junit.Assert.assertEquals(Assert.java:542)
> at
> org.apache.calcite.avatica.RemoteDriverTest.testStatementLifecycle(RemoteDriverTest.java:388)
> {code} Presumably this occurs in Travis because several tests are running
> concurrently.
> I have disabled the test. We must fix this issue and re-enable the test.
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