Exception in thread "SinkRunne​r-PollingR​unner-Defa​ultSinkPro​cessor" on writing to HDFS sink

[wesley dias]

Hi,
 
I am using the latest flume build 1.4 along with hadoop 2.2.0 to collect 
twitter stream and write to HDFS sink. However, on writing to HDFS I get the 
following error:
 
2013-10-28 09:41:23,481 (SinkRunner-PollingRunner-DefaultSinkProcessor) [ERROR 
- org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:422)] 
process failed
java.lang.VerifyError: class 
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$SetOwnerRequestProto
 overrides final method getUnknownFields.()Lcom/google/protobuf/UnknownFieldSet;
     at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
     at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2531)
    at java.lang.Class.privateGetPublicMethods(Class.java:2651)
    at java.lang.Class.privateGetPublicMethods(Class.java:2661)
     at java.lang.Class.getMethods(Class.java:1467)
 
 I am currently new to flume and any help shall be really appreciated.
 
Regards,
 
Wesley