I am using impala2.12.0-cdh5.16.1 and connecting to impala with impala_jdbc_2.6.4.1005. Normally it runs very well, but when I run distcp (which cost the Cluster Network IO and HDFS IO), the java program may throw errors. [Cloudera][ImpalaJDBCDriver](700100) Connection timeout expired. Details: java.net.ConnectException: Connection timed out. java.sql.SQLException: [Cloudera][ImpalaJDBCDriver](700100) Connection timeout expired. Details: java.net.ConnectException: Connection timed out. at com.cloudera.impala.hivecommon.core.HiveJDBCCommonConnection.handleException(Unknown Source) at com.cloudera.impala.jdbc.core.LoginTimeoutConnection.connect(Unknown Source) at com.cloudera.impala.jdbc.common.BaseConnectionFactory.doConnect(Unknown Source) at com.cloudera.impala.jdbc.common.AbstractDriver.connect(Unknown Source) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:270) I tried to add DriverManager.setLoginTimeout(120) to the program,but the error still exists. I think it may be happen because the Cluster Network IO is very high and there may be a parameter which can add the value of timeout so the error will disappear. So, any suggestion about this? Thx. ... View more