phoenix-5.0.0与CDH6.0.1兼容性导致二级索引不可用问题解决
今天在测试phoenix的二级索引功能时，创建完索引写入数据，出现以下异常： Caused by: org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 1 action: org.apache.phoenix.hbase.index.builder.IndexBuildingFailureException: Failed to build index for unexpected reason! at org.apache.phoenix.hbase.index.util.IndexManagementUtil.rethrowIndexingException(IndexManagementUtil.java:206) at org.apache.phoenix.hbase.index.Indexer.preBatchMutate(Indexer.java:351) at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$28.call(RegionCoprocessorHost.java:1010) at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$28.call(RegionCoprocessorHost.java:1007) at org.apache.hadoop.hbase.coprocessor.CoprocessorHost$ObserverOperationWithoutResult.callObserver(CoprocessorHost.java:540) at org.apache.hadoop.hbase.coprocessor.CoprocessorHost.execOperation(CoprocessorHost.java:614) at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.preBatchMutate(RegionCoprocessorHost.java:1007) at org.apache.hadoop.hbase.regionserver.HRegion$MutationBatchOperation.prepareMiniBatchOperations(HRegion.java:3487) at org.apache.hadoop.hbase.regionserver.HRegion.doMiniBatchMutate(HRegion.java:3896) at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:3854) at org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:3785) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doBatchOp(RSRpcServices.java:908) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicBatchOp(RSRpcServices.java:836) at org.apache.hadoop.hbase.regionserver.RSRpcServices.doNonAtomicRegionMutation(RSRpcServices.java:799) at org.apache.hadoop.hbase.regionserver.RSRpcServices.multi(RSRpcServices.java:2551) at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42014) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304) Caused by: java.lang.VerifyError: class org.apache.phoenix.hbase.index.covered.data.IndexMemStore$1 overrides final method compare.(Lorg/apache/hadoop/hbase/Cell;Lorg/apache/hadoop/hbase/Cell;)I at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.apache.phoenix.hbase.index.covered.data.IndexMemStore.<init>(IndexMemStore.java:82) at org.apache.phoenix.hbase.index.covered.LocalTableState.<init>(LocalTableState.java:57) at org.apache.phoenix.hbase.index.covered.NonTxIndexBuilder.getIndexUpdate(NonTxIndexBuilder.java:52) at org.apache.phoenix.hbase.index.builder.IndexBuildManager.getIndexUpdate(IndexBuildManager.java:90) at org.apache.phoenix.hbase.index.Indexer.preBatchMutateWithExceptions(Indexer.java:503) at org.apache.phoenix.hbase.index.Indexer.preBatchMutate(Indexer.java:348) 异常信息可以看出是IndexMemStore这个类初始化的时候加载class时碰到了VerifyError，具体来说就是试图覆盖1个被标记为final的方法，先找这个类的代码看看： public class IndexMemStore implements KeyValueStore { private static final Log LOG = LogFactory.getLog(IndexMemStore.class); private IndexKeyValueSkipListSet kvset; private CellComparator comparator; public IndexMemStore() { this(new CellComparatorImpl(){ @Override public int compare(Cell a, Cell b) { return super.compare(a, b, true); } }); } 覆盖的是CellComparatorImpl的compare方法，该类在hbase-common模块中，我们用的phoenix版本是5.0.0，对应的hbase版本为2.0.0，找到代码看看： @Override public int compare(Cell a, Cell b) { return compare(a, b, false); } 可以看到这个方法并非final，我们使用的是CDH6.0.1，对应的hbase也是2.0.0版本，莫非有所不同，找到代码看看： @Override public final int compare(final Cell a, final Cell b) { return compare(a, b, false); } 居然真的有final修饰符，于是查看社区中该类的修改历史，发现是在2.0.1中进行的如上改动，对应的jira：HBASE-20620，可以看到改动记录： @@ -57,21 +64,17 @@ public class CellComparatorImpl implements CellComparator { public static final CellComparatorImpl META_COMPARATOR = new MetaCellComparator(); @Override - public int compare(Cell a, Cell b) { + public final int compare(final Cell a, final Cell b) { return compare(a, b, false); } 看起来应该是CDH6.0.1中包含了某些hbase2.0.0之后的patch； 解决方法就是修改hbase，把final修饰符去掉即可，然后打包、停服务、换包、起服务，再试已经正常；
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