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From Kirk True <k...@mustardgrain.com>
Subject CLASSPATH errors running unit tests via Eclipse
Date Mon, 06 Jun 2011 16:01:32 GMT
Hi all,

I'm trying to run some of the unit tests within Eclipse. But with a 
fresh checkout of the HDFS source, unit tests that use webapps generate 
errors in Eclipse.

Steps to reproduce:

   1. Get source
         1. cd /tmp
         2. mkdir test
         3. cd test
         4. git clone https://github.com/apache/hadoop-hdfs.git
         5. cd hadoop-hdfs
   2. Set up Eclipse project
         1. Run `ant eclipse`
         2. Run Eclipse with /tmp/test as the workspace
         3. File -> Import...
         4. Import "General" -> "Existing Projects into Workspace",
            click "Next"
         5. Select root directory "/tmp/test", select "hadoop-hdfs" and
            click "Finish"
   3. Navigate to "TestBlockRecovery" test source and select "Run As..."
      "JUnit Test"


I expected it to pass, but instead I get this error:

    java.io.FileNotFoundException: webapps/datanode not found in CLASSPATH
         at
    org.apache.hadoop.http.HttpServer.getWebAppsPath(HttpServer.java:470)
         at org.apache.hadoop.http.HttpServer.<init>(HttpServer.java:186)
         at org.apache.hadoop.http.HttpServer.<init>(HttpServer.java:147)
         at
    org.apache.hadoop.hdfs.server.datanode.DataNode.startInfoServer(DataNode.java:465)
         at
    org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1373)
         at
    org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:401)
         at
    org.apache.hadoop.hdfs.server.datanode.TestBlockRecovery.startUp(TestBlockRecovery.java:114)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
         at
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
         at java.lang.reflect.Method.invoke(Method.java:597)
         at
    org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
         at
    org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
         at
    org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
         at
    org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
         at
    org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
         at
    org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
         at
    org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
         at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
         at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
         at
    org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
         at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
         at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
         at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
         at
    org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
         at
    org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
         at
    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
         at
    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
         at
    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
         at
    org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)


I'm assuming that it's an issue with the Eclipse project generation, but 
I haven't been able to solve it by manually hacking the .classpath 
Eclipse file.

Any ideas?

Thanks,
Kirk

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