[GitHub] flink pull request #:

[tillrohrmann <gi...@git.apache.org>]

Github user tillrohrmann commented on the pull request:

    https://github.com/apache/flink/commit/fca8caea70cb5b76d4d45bdac438d8e3c3fd3315#commitcomment-23558079
  
    In flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml:
    In flink-shaded-hadoop/flink-shaded-hadoop2/pom.xml on line 113:
    Why did you exclude this dependency? I think that's the reason why Flink fails with the following exception when trying to start a Flink yarn session with Hadoop `2.7.1`:
    ```
    Exception in thread "main" java.lang.NoClassDefFoundError: javax/servlet/Filter
    	at java.lang.ClassLoader.defineClass1(Native Method)
    	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    	at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    	at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    	at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    	at java.lang.ClassLoader.defineClass1(Native Method)
    	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    	at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    	at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    	at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    	at org.apache.hadoop.hdfs.DFSConfigKeys.<clinit>(DFSConfigKeys.java:237)
    	at org.apache.hadoop.hdfs.DFSClient$Conf.<init>(DFSClient.java:509)
    	at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:638)
    	at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:619)
    	at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149)
    	at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2653)
    	at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:92)
    	at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2687)
    	at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2669)
    	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:371)
    	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:170)
    	at org.apache.flink.yarn.AbstractYarnClusterDescriptor.startAppMaster(AbstractYarnClusterDescriptor.java:625)
    	at org.apache.flink.yarn.AbstractYarnClusterDescriptor.deployInternal(AbstractYarnClusterDescriptor.java:456)
    	at org.apache.flink.yarn.AbstractYarnClusterDescriptor.deploySessionCluster(AbstractYarnClusterDescriptor.java:362)
    	at org.apache.flink.yarn.cli.FlinkYarnSessionCli.run(FlinkYarnSessionCli.java:677)
    	at org.apache.flink.yarn.cli.FlinkYarnSessionCli$1.call(FlinkYarnSessionCli.java:512)
    	at org.apache.flink.yarn.cli.FlinkYarnSessionCli$1.call(FlinkYarnSessionCli.java:509)
    	at org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:44)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at javax.security.auth.Subject.doAs(Subject.java:422)
    	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
    	at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
    	at org.apache.flink.yarn.cli.FlinkYarnSessionCli.main(FlinkYarnSessionCli.java:509)
    Caused by: java.lang.ClassNotFoundException: javax.servlet.Filter
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    	... 47 more
    ```
    
    The problem seems to be that `DFSConfigKeys` loads `o.a.h.hdfs.web.AuthFilter` which depends on `javax.servlet`.


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