imay opened a new issue #2677: fail to show processlist URL: https://github.com/apache/incubator-doris/issues/2677 **Describe the bug** After I apply this patch #2603 , there is an error when I executed `show processlist` with `mysql_service_nio_enabled` in fe.conf set true The call stack is following ``` 2020-01-06 19:42:32,646 WARN 132 [StmtExecutor.execute():298] execute Exception java.lang.NullPointerException: null at org.apache.doris.qe.ConnectContext$ThreadInfo.toRow(ConnectContext.java:379) ~[palo-fe.jar:?] at org.apache.doris.qe.ShowExecutor.handleShowProcesslist(ShowExecutor.java:270) ~[palo-fe.jar:?] at org.apache.doris.qe.ShowExecutor.execute(ShowExecutor.java:181) ~[palo-fe.jar:?] at org.apache.doris.qe.StmtExecutor.handleShow(StmtExecutor.java:809) ~[palo-fe.jar:?] at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:276) ~[palo-fe.jar:?] at org.apache.doris.qe.ConnectProcessor.handleQuery(ConnectProcessor.java:169) ~[palo-fe.jar:?] at org.apache.doris.qe.ConnectProcessor.dispatch(ConnectProcessor.java:260) ~[palo-fe.jar:?] at org.apache.doris.qe.ConnectProcessor.processOnce(ConnectProcessor.java:420) ~[palo-fe.jar:?] at org.apache.doris.mysql.nio.ReadListener.lambda$handleEvent$0(ReadListener.java:50) ~[palo-fe.jar:?] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_131] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_131] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131] ```
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