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Hudson commented on HBASE-9321: ------------------------------- FAILURE: Integrated in HBase-TRUNK #4446 (See [https://builds.apache.org/job/HBase-TRUNK/4446/]) HBASE-9321 Contention getting the current user in RpcClient.writeRequest (jxiang: rev 1518693) * /hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java * /hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnectionWrapper.java * /hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/RpcClient.java * /hbase/trunk/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientNoCluster.java * /hbase/trunk/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/RPCProtos.java * /hbase/trunk/hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/WALProtos.java * /hbase/trunk/hbase-protocol/src/main/protobuf/RPC.proto * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/RESTServer.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/RESTServlet.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/RESTServletContainer.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/RowResource.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/RowResultGenerator.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/ScannerResource.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/ScannerResultGenerator.java * /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/rest/SchemaResource.java * /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/rest/HBaseRESTTestingUtility.java * /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/rest/TestRowResource.java * /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java > Contention getting the current user in RpcClient$Connection.writeRequest > ------------------------------------------------------------------------ > > Key: HBASE-9321 > URL: https://issues.apache.org/jira/browse/HBASE-9321 > Project: HBase > Issue Type: Bug > Affects Versions: 0.95.2 > Reporter: Jean-Daniel Cryans > Assignee: Jimmy Xiang > Priority: Critical > Fix For: 0.98.0, 0.96.0 > > Attachments: trunk-9321.patch, trunk-9321_v2.patch, > trunk-9321_v3.patch, trunk-9321_v4.patch > > > I've been running tests on clusters with "lots" of regions, about 400, and > I'm seeing weird contention in the client. > This one I see a lot, hundreds and sometimes thousands of threads are blocked > like this: > {noformat} > "htable-pool4-t74" daemon prio=10 tid=0x00007f2254114000 nid=0x2a99 waiting > for monitor entry [0x00007f21f9e94000] > java.lang.Thread.State: BLOCKED (on object monitor) > at > org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:466) > - waiting to lock <0x00000000fb5ad000> (a java.lang.Class for > org.apache.hadoop.security.UserGroupInformation) > at > org.apache.hadoop.hbase.ipc.RpcClient$Connection.writeRequest(RpcClient.java:1013) > at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1407) > at > org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1634) > at > org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1691) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.multi(ClientProtos.java:27339) > at > org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:105) > at > org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:43) > at > org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:183) > {noformat} > While the holder is doing this: > {noformat} > "htable-pool17-t55" daemon prio=10 tid=0x00007f2244408000 nid=0x2a98 runnable > [0x00007f21f9f95000] > java.lang.Thread.State: RUNNABLE > at java.security.AccessController.getStackAccessControlContext(Native > Method) > at java.security.AccessController.getContext(AccessController.java:487) > at > org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:466) > - locked <0x00000000fb5ad000> (a java.lang.Class for > org.apache.hadoop.security.UserGroupInformation) > at > org.apache.hadoop.hbase.ipc.RpcClient$Connection.writeRequest(RpcClient.java:1013) > at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1407) > at > org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1634) > at > org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1691) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.multi(ClientProtos.java:27339) > at > org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:105) > at > org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:43) > at > org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:183) > {noformat} -- This message is automatically generated by JIRA. 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