Bilwa S T created YARN-9738: ------------------------------- Summary: Remove lock on ClusterNodeTracker#getNodeReport as it blocks application submission Key: YARN-9738 URL: https://issues.apache.org/jira/browse/YARN-9738 Project: Hadoop YARN Issue Type: Bug Reporter: Bilwa S T Assignee: Bilwa S T
*Env : * Server OS :- UBUNTU No. of Cluster Node:- 9120 NMs Env Mode:- [Secure / Non secure]Secure *Preconditions:* ~9120 NM's was running ~1250 applications was in running state 35K applications was in pending state *Test Steps:* 1. Submit the application from 5 clients, each client 2 threads and total 10 queues 2. Once application submittion increases (for each application of distributted shell will call getClusterNodes) ClientRMservice#getClusterNodes tries to get ClusterNodeTracker#getNodeReport where map nodes is locked. {quote} "IPC Server handler 36 on 45022" #246 daemon prio=5 os_prio=0 tid=0x00007f75095de000 nid=0x1949c waiting on condition [0x00007f74cff78000] java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for <0x00007f759f6d8858> (a java.util.concurrent.locks.ReentrantReadWriteLock$FairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:967) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1283) at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:727) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.ClusterNodeTracker.getNodeReport(ClusterNodeTracker.java:123) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.AbstractYarnScheduler.getNodeReport(AbstractYarnScheduler.java:449) at org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.createNodeReports(ClientRMService.java:1067) at org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getClusterNodes(ClientRMService.java:992) at org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getClusterNodes(ApplicationClientProtocolPBServiceImpl.java:313) at org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:589) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:530) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1036) at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:928) at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:863) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1729) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2792) {quote} Instead we can make nodes as concurrentHashMap and remove readlock -- This message was sent by Atlassian JIRA (v7.6.14#76016) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org