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stack commented on HBASE-4890: ------------------------------ Any more luck w/ this one J-D (or you got distracted?) > fix possible NPE in HConnectionManager > -------------------------------------- > > Key: HBASE-4890 > URL: https://issues.apache.org/jira/browse/HBASE-4890 > Project: HBase > Issue Type: Bug > Affects Versions: 0.92.0 > Reporter: Jonathan Hsieh > Priority: Blocker > Fix For: 0.92.1 > > > I was running YCSB against a 0.92 branch and encountered this error message: > {code} > 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 > {code} > It looks like the NPE is caused by server being null in the MultiRespone > call() method. > {code} > 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()); > } > } > ); > {code} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira