Description
I was running YCSB against a 0.92 branch and encountered this error message:
11/11/29 08:47:16 WARN client.HConnectionManager$HConnectionImplementation: Failed all from region=usertable,user3917479014967760871,1322555655231.f78d161e5724495a9723bcd972f97f41., hostname=c0316.hal.cloudera.com, port=57020 java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.lang.NullPointerException at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) at java.util.concurrent.FutureTask.get(FutureTask.java:83) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatchCallback(HConnectionManager.java:1501) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatch(HConnectionManager.java:1353) at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:898) at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:775) at org.apache.hadoop.hbase.client.HTable.put(HTable.java:750) at com.yahoo.ycsb.db.HBaseClient.update(Unknown Source) at com.yahoo.ycsb.DBWrapper.update(Unknown Source) at com.yahoo.ycsb.workloads.CoreWorkload.doTransactionUpdate(Unknown Source) at com.yahoo.ycsb.workloads.CoreWorkload.doTransaction(Unknown Source) at com.yahoo.ycsb.ClientThread.run(Unknown Source) Caused by: java.lang.RuntimeException: java.lang.NullPointerException at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionServerWithoutRetries(HConnectionManager.java:1315) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3.call(HConnectionManager.java:1327) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3.call(HConnectionManager.java:1325) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.NullPointerException at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:158) at $Proxy4.multi(Unknown Source) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3$1.call(HConnectionManager.java:1330) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3$1.call(HConnectionManager.java:1328) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getRegionServerWithoutRetries(HConnectionManager.java:1309) ... 7 more
It looks like the NPE is caused by server being null in the MultiRespone call() method.
public MultiResponse call() throws IOException { return getRegionServerWithoutRetries( new ServerCallable<MultiResponse>(connection, tableName, null) { public MultiResponse call() throws IOException { return server.multi(multi); } @Override public void connect(boolean reload) throws IOException { server = connection.getHRegionConnection(loc.getHostname(), loc.getPort()); } } );
Attachments
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Issue Links
- relates to
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HBASE-5336 Spurious exceptions in HConnectionImplementation
- Closed