[jboss-jira] [JBoss JIRA] (WFLY-5571) Intermittent failure in ModelPersistenceTestCase.testSimpleOperation

[Brian Stansberry (JIRA)]

Brian Stansberry created WFLY-5571:
--------------------------------------

             Summary: Intermittent failure in ModelPersistenceTestCase.testSimpleOperation
                 Key: WFLY-5571
                 URL: https://issues.jboss.org/browse/WFLY-5571
             Project: WildFly
          Issue Type: Bug
          Components: Domain Management
    Affects Versions: 10.0.0.CR3
            Reporter: Brian Stansberry
            Assignee: Brian Stansberry


ModelPersistenceTestCase.testSimpleOperation occasionally fails with the following pattern:

{code}
java.lang.AssertionError: null
    at org.junit.Assert.fail(Assert.java:86)
    at org.junit.Assert.assertTrue(Assert.java:41)
    at org.junit.Assert.assertTrue(Assert.java:52)
    at org.jboss.as.test.integration.management.api.ModelPersistenceTestCase.testSimpleOperation(ModelPersistenceTestCase.java:119)
------- Stdout: -------
14:06:18,604 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 1) org.jboss.as.controller.persistence.ConfigurationPersistenceException: WFLYCTL0081: Failed to back up C:\BuildAgent\work\a31d203e70e89f90\testsuite\integration\basic\target\jbossas\standalone\configuration\standalone.xml: org.jboss.as.controller.persistence.ConfigurationPersistenceException: WFLYCTL0081: Failed to back up C:\BuildAgent\work\a31d203e70e89f90\testsuite\integration\basic\target\jbossas\standalone\configuration\standalone.xml
    at org.jboss.as.controller.persistence.ConfigurationFile.fileWritten(ConfigurationFile.java:552)
    at org.jboss.as.controller.persistence.ConfigurationFilePersistenceResource.doCommit(ConfigurationFilePersistenceResource.java:65)
    at org.jboss.as.controller.persistence.AbstractFilePersistenceResource.commit(AbstractFilePersistenceResource.java:58)
    at org.jboss.as.controller.ModelControllerImpl$4.commit(ModelControllerImpl.java:780)
    at org.jboss.as.controller.AbstractOperationContext.executeDoneStage(AbstractOperationContext.java:743)
    at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:680)
    at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:370)
    at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1336)
    at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:391)
    at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:217)
    at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.doExecute(ModelControllerClientOperationHandler.java:207)
    at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.access$300(ModelControllerClientOperationHandler.java:129)
    at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1$1.run(ModelControllerClientOperationHandler.java:151)
    at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1$1.run(ModelControllerClientOperationHandler.java:147)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:92)
    at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1.execute(ModelControllerClientOperationHandler.java:147)
    at org.jboss.as.protocol.mgmt.AbstractMessageHandler$2$1.doExecute(AbstractMessageHandler.java:299)
    at org.jboss.as.protocol.mgmt.AbstractMessageHandler$AsyncTaskRunner.run(AbstractMessageHandler.java:519)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
    at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.nio.file.FileSystemException: C:\BuildAgent\work\a31d203e70e89f90\testsuite\integration\basic\target\jbossas\standalone\configuration\standalone_xml_history\standalone.last.xml: The process cannot access the file because it is being used by another process.

    at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
    at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
    at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)
    at sun.nio.fs.WindowsFileCopy.copy(WindowsFileCopy.java:165)
    at sun.nio.fs.WindowsFileSystemProvider.copy(WindowsFileSystemProvider.java:278)
    at java.nio.file.Files.copy(Files.java:1274)
    at org.jboss.as.controller.persistence.FilePersistenceUtils.copyFile(FilePersistenceUtils.java:73)
    at org.jboss.as.controller.persistence.ConfigurationFile.fileWritten(ConfigurationFile.java:550)
    ... 23 more
{code}

The test fails because the standalone.last.xml file isn't being updated as expected; the file isn't  updated due to the "The process cannot access the file because it is being used by another process"  IOException.

3 generally possibilities come to mind:

1) There's some other process on the CI server that really is using the file. Something like antivirus that touches lots of files briefly. (Not suggesting its actually AV.) It's odd we don't get other failures though; e.g. failures to persist the main config file.

2) It's the test driver process that's holding the file, conflicting with the server process. This is certainly possible. I've looked though and the test driver seems to be correct in terms of how it handles the file, reading it to calculate a CRC and then closing the stream used to do that in a finally block. It's also odd that this would only happen on Windows CI. Still, since we know we have 2 processes, test driver and server, both touching a file and we are getting an exception about 2 processes conflicting over that file, something in this area seems most likely.

3) There's some flaw in ConfigurationFile itself. But it's odd that a flaw there would produce an exception talking about how the file "is being used by another process".



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