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ZeroCopyLiteralByteString cannot access superclass

發布時間：2025/7/14 编程问答 19 豆豆

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問題描述

在HBase上運行MapReduce作業時，報如下異常：IllegalAccessError: class com.google.protobuf.HBaseZeroCopyByteString cannot access its superclass com.google.protobuf.LiteralByteString

使用HBase環境如下：CDH5.0.1, HBase版本：0.96.1

問題原因

This isssue occurs because of an optimization introduced in??HBASE-9867??that inadvertently introduced a classloader dependency. This affects both jobs using the??-libjars??option and "fat jar," jobs which package their runtime dependencies in a nested lib folder.

這個問題的發生是由于優化了?HBASE-9867??引起的，無意間引進了一個依賴類加載器。它影響使用-libjars參數和使用 fat jar兩種模式的job.?

fat jar模式Hadoop的一個特殊功能：可以讀取操作目錄中/lib目錄下包含的所有庫的JAR文件，把運行job依賴的jar放在jar中的lib目錄下。

解決方案

1、永久解決方案

cd?/opt/cloudera/parcels/CDH-5.0.0-1.cdh5.0.0.p0.47/lib/hadoop

ln -s /opt/cloudera/parcels/CDH-5.0.0-1.cdh5.0.0.p0.47/lib/hbase/lib/hbase-protocol-0.96.1.1-cdh5.0.0.jar hbase-protocol-0.96.1.1-cdh5.0.0.jar

2: 臨時解決方案

HADOOP_CLASSPATH=/opt/cloudera/parcels/CDH-5.0.0-1.cdh5.0.0.p0.47/lib/hbase/lib/hbase-protocol-0.96.1.1-cdh5.0.0.jar:/etc/hbase/conf hadoop ?jar myjar.jar MyJobMainClass

詳細報錯信息

14/07/16 14:40:50 WARN client.HConnectionManager$HConnectionImplementation: Encountered problems when prefetch hbase:meta table:

org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=10, exceptions:

Wed Jul 16 14:32:49 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405,

java.lang.IllegalAccessError: class com.google.protobuf.HBaseZeroCopyByteString cannot access its superclass com.google.protobuf.LiteralByteString

Wed Jul 16 14:32:52 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:32:57 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:33:07 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:33:28 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:34:08 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:35:49 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:37:29 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:39:10 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405, java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

Wed Jul 16 14:40:50 CST 2014, org.apache.hadoop.hbase.client.RpcRetryingCaller@52380405,

java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

? ? ? ? at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:134)

? ? ? ? at org.apache.hadoop.hbase.client.HTable.getRowOrBefore(HTable.java:705)

? ? ? ? at org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:144)

? ? ? ? at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.prefetchRegionCache(HConnectionManager.java:1102)

? ? ? ? at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:1162)

? ? ? ? at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:1054)

? ? ? ? at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:1011)

? ? ? ? at org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:326)

? ? ? ? at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:192)

? ? ? ? at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:150)

? ? ? ? at org.apache.hadoop.hbase.mapreduce.TableOutputFormat.setConf(TableOutputFormat.java:206)

? ? ? ? at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:73)

? ? ? ? at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)

? ? ? ? at org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:455)

? ? ? ? at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:343)

? ? ? ? at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1295)

? ? ? ? at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1292)

? ? ? ? at java.security.AccessController.doPrivileged(Native Method)

? ? ? ? at javax.security.auth.Subject.doAs(Subject.java:415)

? ? ? ? at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)

? ? ? ? at org.apache.hadoop.mapreduce.Job.submit(Job.java:1292)

? ? ? ? at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1313)

? ? ? ? at mapreduce.ImportFromFile.run(ImportFromFile.java:228)

? ? ? ? at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)

? ? ? ? at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)

? ? ? ? at mapreduce.ImportFromFile.main(ImportFromFile.java:185)

? ? ? ? at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

? ? ? ? at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

? ? ? ? at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

? ? ? ? at java.lang.reflect.Method.invoke(Method.java:606)

? ? ? ? at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)

? ? ? ? at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)

? ? ? ? at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:152)

? ? ? ? at mapreduce.Driver.main(Driver.java:29)

? ? ? ? at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

? ? ? ? at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

? ? ? ? at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

? ? ? ? at java.lang.reflect.Method.invoke(Method.java:606)

? ? ? ? at org.apache.hadoop.util.RunJar.main(RunJar.java:212)

Caused by: java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

? ? ? ? at org.apache.hadoop.hbase.protobuf.RequestConverter.buildRegionSpecifier(RequestConverter.java:897)

? ? ? ? at org.apache.hadoop.hbase.protobuf.RequestConverter.buildGetRowOrBeforeRequest(RequestConverter.java:131)

? ? ? ? at org.apache.hadoop.hbase.protobuf.ProtobufUtil.getRowOrBefore(ProtobufUtil.java:1402)

? ? ? ? at org.apache.hadoop.hbase.client.HTable$2.call(HTable.java:701)

? ? ? ? at org.apache.hadoop.hbase.client.HTable$2.call(HTable.java:699)

? ? ? ? at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:120)

? ? ? ? ... 38 more

Exception in thread "main" java.lang.IllegalAccessError: com/google/protobuf/HBaseZeroCopyByteString

? ? ? ? at org.apache.hadoop.hbase.protobuf.RequestConverter.buildRegionSpecifier(RequestConverter.java:897)

? ? ? ? at org.apache.hadoop.hbase.protobuf.RequestConverter.buildGetRowOrBeforeRequest(RequestConverter.java:131)

? ? ? ? at org.apache.hadoop.hbase.protobuf.ProtobufUtil.getRowOrBefore(ProtobufUtil.java:1402)

? ? ? ? at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:1176)