Could be related to incompatible protobuf versions. What's the output of: mvn dependency:tree
Please pastebin it - it should be fairly long. On Mon, Oct 10, 2016 at 6:29 PM, big data <bigdatab...@outlook.com> wrote: > Dear all, > > I've created an Endpoint coprocessor, and deployed it through hbase shell. > > Then when I run client code, when code > > response = rpcCallback.get(); > > rpcCallback.get() return null; > > in the resion server log, i found this exception: > > 2016-10-10 15:50:07,636 ERROR > org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost: > Failed to load coprocessor AndEndPoint > > java.lang.LinkageError: loader constraint violation in interface itable > initialization: when resolving method > "AndEndPoint.getService()Lcom/google/protobuf/Service;" the class loader > (instance of > org/apache/hadoop/hbase/util/CoprocessorClassLoader) of the current > class, AndEndPoint, and the class loader (instance of > sun/misc/Launcher$AppClassLoader) for interface > org/apache/hadoop/hbase/coprocessor/CoprocessorService > have different Class objects for > the type otobuf/Service; used in the signature > > Any solution to solve this problem? > > thanks. > > > My pom like this: > > <dependency> > <groupId>org.apache.hadoop</groupId> > <artifactId>hadoop-client</artifactId> > <version>2.6.0</version> > </dependency> > <dependency> > <groupId>org.apache.hadoop</groupId> > <artifactId>hadoop-common</artifactId> > <version>2.6.0</version> > </dependency> > <dependency> > <groupId>org.apache.hbase</groupId> > <artifactId>hbase-server</artifactId> > <version>1.0.1</version> > </dependency> > > >
