Shweta created HDFS-14081: ----------------------------- Summary: hdfs dfsadmin -metasave metasave_test results NPE Key: HDFS-14081 URL: https://issues.apache.org/jira/browse/HDFS-14081 Project: Hadoop HDFS Issue Type: Bug Components: hdfs Affects Versions: 3.2.1 Reporter: Shweta Assignee: Shweta Fix For: 3.2.1
Race condition is encountered while adding Block to postponedMisreplicatedBlocks which in turn tried to retrieve Block from BlockManager in which it may not be present. This happens in HA, metasave in first NN succeeded but failed in second NN, StackTrace showing NPE is as follows: 2018-07-12 21:39:09,783 WARN org.apache.hadoop.ipc.Server: IPC Server handler 24 on 8020, call Call#1 Retry#0 org.apache.hadoop.hdfs.protocol.ClientProtocol.metaSave from 172.26.9.163:602342018-07-12 21:39:09,783 WARN org.apache.hadoop.ipc.Server: IPC Server handler 24 on 8020, call Call#1 Retry#0 org.apache.hadoop.hdfs.protocol.ClientProtocol.metaSave from 172.26.9.163:60234java.lang.NullPointerException at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseSourceDatanodes(BlockManager.java:2175) at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.dumpBlockMeta(BlockManager.java:830) at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.metaSave(BlockManager.java:762) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.metaSave(FSNamesystem.java:1782) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.metaSave(FSNamesystem.java:1766) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.metaSave(NameNodeRpcServer.java:1320) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.metaSave(ClientNamenodeProtocolServerSideTranslatorPB.java:928) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:523) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:991) at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:869) at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:815) 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:1685) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2675) -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org