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https://issues.apache.org/jira/browse/DERBY-6714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14110620#comment-14110620
]
Knut Anders Hatlen commented on DERBY-6714:
-------------------------------------------
I'm able to reproduce the bug by running Connection.close() followed by
NetworkServerControl.getRuntimeInfo() in a tight loop.
{code:java}
NetworkServerControl control = new NetworkServerControl();
control.start(new PrintWriter(System.out));
Thread.sleep(2000L); // give the server time to start
while (true) {
DriverManager.getConnection("jdbc:derby://localhost/memory:db;create=true").close();
control.getRuntimeInfo();
}
{code}
It eventually fails with "Invalid reply from network server: Insufficient
data." and a NullPointerException in derby.log.
> RuntimeInfoTest failed with insufficient data from server
> ---------------------------------------------------------
>
> Key: DERBY-6714
> URL: https://issues.apache.org/jira/browse/DERBY-6714
> Project: Derby
> Issue Type: Bug
> Components: Network Server
> Affects Versions: 10.12.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Attachments: derby.log
>
>
> Seen in the nightly testing of trunk.
> http://download.java.net/javadesktop/derby/request_5595117/javadb-task-3919785.html
> {noformat}
> java.lang.Exception: DRDA_InvalidReplyTooShort.S:Ungültige Antwort von
> Network Server: Daten nicht ausreichend.
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.consolePropertyMessageWork(NetworkServerControlImpl.java:3357)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.consolePropertyMessage(NetworkServerControlImpl.java:1988)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.fillReplyBuffer(NetworkServerControlImpl.java:2957)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.readStringReply(NetworkServerControlImpl.java:3010)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.runtimeInfo(NetworkServerControlImpl.java:1443)
> at
> org.apache.derby.drda.NetworkServerControl.getRuntimeInfo(NetworkServerControl.java:516)
> at
> org.apache.derbyTesting.functionTests.tests.derbynet.RuntimeInfoTest.x_testRuntimeInfoAfterConnClose(RuntimeInfoTest.java:193)
> at
> org.apache.derbyTesting.functionTests.tests.derbynet.RuntimeInfoTest.testRunTests(RuntimeInfoTest.java:97)
> at
> org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:119)
> 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)
> at
> org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:58)
> 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)
> 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)
> at
> org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:58)
> 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)
> 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)
> 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)
> {noformat}
> [^derby.log] showed that there was a NullPointerException while building the
> runtimeinfo string:
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.derby.impl.drda.Database.buildRuntimeInfo(Database.java:417)
> at org.apache.derby.impl.drda.Session.buildRuntimeInfo(Session.java:291)
> at
> org.apache.derby.impl.drda.DRDAConnThread.buildRuntimeInfo(DRDAConnThread.java:9186)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.buildRuntimeInfo(NetworkServerControlImpl.java:4069)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.getRuntimeInfo(NetworkServerControlImpl.java:2229)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.sendRuntimeInfo(NetworkServerControlImpl.java:2157)
> at
> org.apache.derby.impl.drda.NetworkServerControlImpl.processCommands(NetworkServerControlImpl.java:1804)
> at
> org.apache.derby.impl.drda.DRDAConnThread.sessionInitialState(DRDAConnThread.java:665)
> at
> org.apache.derby.impl.drda.DRDAConnThread.run(DRDAConnThread.java:284)
> {noformat}
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