I'm trying to build the latest svn version of hadoop (r1480394 | 2013-05-08 11:28:22) with maven, but I get many errors of the following kind (this is a small snippet of the output). It appears that something is wrong with protobuf, I have version 2.5.0-3 installed. Any hints on how I can fix this?
[ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[878,4] error: method does not override or implement a method from a supertype [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1027,12] error: cannot find symbol [ERROR] symbol: method ensureFieldAccessorsInitialized(Class<GracefulFailoverRequestProto>,Class<Builder>) [ERROR] location: variable internal_static_hadoop_common_GracefulFailoverRequestProto_fieldAccessorTable of type FieldAccessorTable [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1108,104] error: cannot find symbol [ERROR] symbol: method getUnfinishedMessage() [ERROR] location: variable e of type InvalidProtocolBufferException [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1157,8] error: getUnknownFields() in GracefulFailoverResponseProto cannot override getUnknownFields() in GeneratedMessage [ERROR] overridden method is final [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1176,19] error: cannot find symbol [ERROR] symbol: method parseUnknownField(CodedInputStream,Builder,ExtensionRegistryLite,int) [ERROR] location: class GracefulFailoverResponseProto [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1185,15] error: cannot find symbol [ERROR] symbol: method setUnfinishedMessage(GracefulFailoverResponseProto) [ERROR] location: variable e of type InvalidProtocolBufferException [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1188,27] error: cannot find symbol [ERROR] symbol: method setUnfinishedMessage(GracefulFailoverResponseProto) [ERROR] location: class InvalidProtocolBufferException [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1191,8] error: cannot find symbol [ERROR] symbol: method makeExtensionsImmutable() [ERROR] location: class GracefulFailoverResponseProto [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1202,10] error: cannot find symbol [ERROR] symbol: method ensureFieldAccessorsInitialized(Class<GracefulFailoverResponseProto>,Class<Builder>) [ERROR] location: variable internal_static_hadoop_common_GracefulFailoverResponseProto_fieldAccessorTable of type FieldAccessorTable [ERROR] /home/konne/Projects/jsr308/user-study/ohloh/projects/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java/org/apache/hadoop/ha/proto/ZKFCProtocolProtos.java:[1207,31] error: cannot find symbol [ERROR] symbol: class AbstractParser [ERROR] location: package com.google.protobuf
