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Posted to yarn-issues@hadoop.apache.org by "Jonathan Turner Eagles (Jira)" <ji...@apache.org> on 2022/04/27 22:11:00 UTC
[jira] [Created] (YARN-11116) Migrate Times util from SimpleDateFormat to thread-safe DateTimeFormatter class
Jonathan Turner Eagles created YARN-11116:
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Summary: Migrate Times util from SimpleDateFormat to thread-safe DateTimeFormatter class
Key: YARN-11116
URL: https://issues.apache.org/jira/browse/YARN-11116
Project: Hadoop YARN
Issue Type: Bug
Reporter: Jonathan Turner Eagles
Assignee: Jonathan Turner Eagles
Came across a stack trace with SimpleDateFormatter in it which led me to investigate current practices
{noformat}
6578 "IPC Server handler 29 on 8032" #797 daemon prio=5 os_prio=0 tid=0x00007fb6527d0000 nid=0x953b runnable [0x00007fb5ba034000]
6579 java.lang.Thread.State: RUNNABLE
6580 at org.apache.hadoop.yarn.util.Times.formatISO8601(Times.java:95)
6581 at org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.createAndGetApplicationReport(RMAppImpl.java:810)
6582 at org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplicationReport(ClientRMService.java:396)
6583 at org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getApplicationReport(ApplicationClientProtocolPBServiceImpl.java:224)
6584 at org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:529)
6585 at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:530)
6586 at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:500)
6587 at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1069)
6588 at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1003)
6589 at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:936)
6590 at java.security.AccessController.doPrivileged(Native Method)
6591 at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:2135)
6592 at org.apache.hadoop.security.UserGroupInformation.doAsPrivileged(UserGroupInformation.java:2123)
6593 at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2875)
6594
{noformat}
DateTimeFormatter is thread-safe meaning no need to wrap the class in Thread local as they can be reused safely across threads. In addition, the new classes are slightly more performant.
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