[LIVY-752] Livy TS does not accept any connections when limits are set on connections

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.8.0
• Component/s: Thriftserver
• Assignee: Wing Yew Poon
• Reporter: Wing Yew Poon
• Created: 29/Feb/20 22:49
• Updated: 16/Mar/20 16:48
• Resolved: 16/Mar/20 16:48

Description

I set livy.server.thrift.limit.connections.per.user=20 on my Livy Server. When I try to connect to it, I get

2020-02-28 17:13:30,443 WARN org.apache.livy.thriftserver.cli.ThriftBinaryCLIService: Error opening session: 
java.lang.NullPointerException
	at org.apache.livy.thriftserver.LivyThriftSessionManager.incrementConnectionsCount(LivyThriftSessionManager.scala:438)
	at org.apache.livy.thriftserver.LivyThriftSessionManager.incrementConnections(LivyThriftSessionManager.scala:425)
	at org.apache.livy.thriftserver.LivyThriftSessionManager.openSession(LivyThriftSessionManager.scala:222)
	at org.apache.livy.thriftserver.LivyCLIService.openSessionWithImpersonation(LivyCLIService.scala:121)
	at org.apache.livy.thriftserver.cli.ThriftCLIService.getSessionHandle(ThriftCLIService.scala:324)
	at org.apache.livy.thriftserver.cli.ThriftCLIService.OpenSession(ThriftCLIService.scala:203)
	at org.apache.hive.service.rpc.thrift.TCLIService$Processor$OpenSession.getResult(TCLIService.java:1497)
	at org.apache.hive.service.rpc.thrift.TCLIService$Processor$OpenSession.getResult(TCLIService.java:1482)
	at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
	at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
	at org.apache.hive.service.auth.TSetIpAddressProcessor.process(TSetIpAddressProcessor.java:56)
	at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

Issue Links

• links to: GitHub Pull Request #284