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https://issues.apache.org/jira/browse/DERBY-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13020828#comment-13020828
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Knut Anders Hatlen commented on DERBY-5192:
-------------------------------------------
Thanks, Dag and Bryan, for looking at the patch.
I think Bryan is right that this bug is not likely to affect servers in
production, since they usually run for a longer time before they're shut down.
The one thing that could also affect production servers, is the lack of
protection against spurious wakeups from the wait() call. The javadoc for
wait() says that wait() could return even when notify() and notifyAll() haven't
been called, but blockingStart() doesn't account for that and treats every
wakeup as a shutdown signal.
> Setting up network server for management tests hangs intermittently
> -------------------------------------------------------------------
>
> Key: DERBY-5192
> URL: https://issues.apache.org/jira/browse/DERBY-5192
> Project: Derby
> Issue Type: Bug
> Components: Network Server
> Affects Versions: 10.8.1.1
> Environment: Derby 10.8.1.0 - FreeBSD 8.2 (i386) - OpenJDK 6 (b20)
> Derby 10.8.1.0 - Oracle Enterprise Linux 6.0 (x86_64) - OpenJDK 6 (b17)
> Derby 10.8.1.1 - Debian GNU/Linux 6.0.1 (i386) - JDK 7 (build 1.7.0-ea-b135)
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Attachments: wait-notify.diff
>
>
> I've seen on three occurrences with the 10.8.1.0 and 10.8.1.1 release
> candidates that suites.All has been stuck when setting up the network server
> decorator for the management test suite. Here's what I see at the end of the
> console output (running with derby.tests.trace=true):
> [junit] test_jdbc4_1 used 0 ms
> [junit] test_jdbc4_1 used 0 ms
> [junit] test_notBooted used 1623 ms java.net.SocketException: Connection
> reset
> [junit] at java.net.SocketInputStream.read(SocketInputStream.java:189)
> [junit] at java.net.SocketInputStream.read(SocketInputStream.java:121)
> [junit] at java.net.SocketInputStream.read(SocketInputStream.java:107)
> [junit] at
> org.apache.derby.impl.drda.NetworkServerControlImpl.fillReplyBuffer(Unknown
> Source)
> [junit] at
> org.apache.derby.impl.drda.NetworkServerControlImpl.readResult(Unknown Source)
> [junit] at
> org.apache.derby.impl.drda.NetworkServerControlImpl.pingWithNoOpen(Unknown
> Source)
> [junit] at
> org.apache.derby.impl.drda.NetworkServerControlImpl.ping(Unknown Source)
> [junit] at org.apache.derby.drda.NetworkServerControl.ping(Unknown
> Source)
> [junit] at
> org.apache.derbyTesting.junit.NetworkServerTestSetup.pingForServerUp(NetworkServerTestSetup.java:567)
> [junit] at
> org.apache.derbyTesting.junit.NetworkServerTestSetup.pingForServerStart(NetworkServerTestSetup.java:636)
> [junit] at
> org.apache.derbyTesting.junit.NetworkServerTestSetup.setUp(NetworkServerTestSetup.java:196)
> [junit] at junit.extensions.TestSetup$1.protect(TestSetup.java:20)
> [junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
> [junit] at junit.extensions.TestSetup.run(TestSetup.java:25)
> [junit] at
> org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
> [junit] at
> junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> [junit] at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> [junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
> [junit] at junit.extensions.TestSetup.run(TestSetup.java:25)
> [junit] at
> junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> [junit] at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> [junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
> [junit] at junit.extensions.TestSetup.run(TestSetup.java:25)
> [junit] at
> org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
> [junit] at junit.framework.TestSuite.runTest(TestSuite.java:230)
> [junit] at junit.framework.TestSuite.run(TestSuite.java:225)
> [junit] at junit.framework.TestSuite.runTest(TestSuite.java:230)
> [junit] at junit.framework.TestSuite.run(TestSuite.java:225)
> [junit] at junit.framework.TestSuite.runTest(TestSuite.java:230)
> [junit] at junit.framework.TestSuite.run(TestSuite.java:225)
> [junit] at junit.framework.TestSuite.runTest(TestSuite.java:230)
> [junit] at junit.framework.TestSuite.run(TestSuite.java:225)
> [junit] at
> org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:518)
> [junit] at
> org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1052)
> [junit] at
> org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:906)
> The exception trace is just printed to the console, but it doesn't make any
> test fail. (The exception printed on FreeBSD was different, it said
> "DRDA_InvalidReplyTooShort.S:Invalid reply from network server: Insufficient
> data." The other two looked like the one above.)
> All the hangs have happened on VirtualBox instances, though with different
> guest operating systems and JVMs. Probably the timing is different from what
> we have on physical machines.
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