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HBase >> mail # user >> java.lang.ClassNotFoundException: com.google.protobuf.Message


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java.lang.ClassNotFoundException: com.google.protobuf.Message
Hi all,

I just upgraded from HBase 0.90.2 to 0.94 (running on hadoop 0.20.3).

It seems like the cluster is up and running.

I tried running an old MR job that writes into HBase, and after Map is
complete (map 100%) and before Reduce begins (reduce 0%) - I got the
following Exception:

12/05/29 12:32:02 INFO mapred.JobClient: Task Id :
attempt_201205291226_0001_r_000000_0, Status : FAILED
Error: java.lang.ClassNotFoundException: com.google.protobuf.Message
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at
org.apache.hadoop.hbase.io.HbaseObjectWritable.<clinit>(HbaseObjectWritable.java:263)
at org.apache.hadoop.hbase.ipc.Invocation.write(Invocation.java:138)
at
org.apache.hadoop.hbase.ipc.HBaseClient$Connection.sendParam(HBaseClient.java:537)
at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:898)
at
org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:150)
at $Proxy2.getProtocolVersion(Unknown Source)
at
org.apache.hadoop.hbase.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:183)
at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:303)
at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:280)
at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:332)
at org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:236)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1284)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1240)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1227)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:936)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:832)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:801)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:933)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:836)
at
org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:801)
at org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:234)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:174)
at
org.apache.hadoop.hbase.client.HTableFactory.createHTableInterface(HTableFactory.java:36)
at
org.apache.hadoop.hbase.client.HTablePool.createHTable(HTablePool.java:268)
at
org.apache.hadoop.hbase.client.HTablePool.findOrCreateTable(HTablePool.java:198)
at org.apache.hadoop.hbase.client.HTablePool.getTable(HTablePool.java:173)
at
com.infolinks.hadoop.commons.hbase.HBaseOperations.getTable(HBaseOperations.java:118)
at com.infolinks.hadoop.framework.HBaseReducer.setup(HBaseReducer.java:30)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:174)
at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:566)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408)
at org.apache.hadoop.mapred.Child.main(Child.java:170)

I saw something about the dependencies in HBASE-5497 and 5460 - but I
understand that those were fixed in 0.94...

Any ideas ?

Thanks,
Amit.