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via Google Groups by Arthur Chan, 2 years ago
com.google.protobuf.ProtocolStringList: 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:246)	at com.sun.proxy.$Proxy15.addBlock(Unknown Source)	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:399)