Thanks! It reports 2.3.0. I will update. John
From: Ted Yu [mailto:yuzhih...@gmail.com] Sent: Wednesday, May 29, 2013 12:37 PM To: user@hadoop.apache.org Subject: Re: Help: error in hadoop build What's the output of: protoc --version You should be using 2.4.1 Cheers On Wed, May 29, 2013 at 11:33 AM, John Lilley <john.lil...@redpoint.net<mailto:john.lil...@redpoint.net>> wrote: Sorry if this is a dumb question, but I'm not sure where to start. I am following BUILDING.txt instructions for source checked out today using git: git clone git://git.apache.org/hadoop-common.git<http://git.apache.org/hadoop-common.git> Hadoop Following build steps and adding -X for more logging: mvn compile -X But I get this error in Hadoop common [WARNING] [protoc, --java_out=/home/jlilley/hadoop/hadoop-common-project/hadoop-common/target/generated-sources/java, -I/home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto, /home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto/Security.proto, /home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto/ZKFCProtocol.proto, /home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto/RpcHeader.proto, /home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto/ProtobufRpcEngine.proto, /home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto/IpcConnectionContext.proto, /home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto/HAServiceProtocol.proto, /home/jlilley/hadoop/hadoop-common-project/hadoop-common/src/main/proto/ProtocolInfo.proto] failed with error code 1 [DEBUG] Security.proto:22:8: Option "java_generate_equals_and_hash" unknown. [ERROR] protoc compiler error The following were installed today, this is basically on a clean CentOS6 system: # history | grep yum 81 yum install protobuf-compiler 82 yum install gcc 84 yum install gcc-c++ 85 yum install cmake 86 yum install make 87 yum install zlib 90 yum install git 93 yum install eclipse This seems to indicate that the problem may have to do with a too-recent protobuf and additional settings that must be applied because of that: http://mail-archives.apache.org/mod_mbox/hadoop-mapreduce-dev/201106.mbox/%3c4dfa3c67.50...@gmail.com%3E Thanks John
