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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.

2019/02/28 12:54:26 531873 ERROR run.QihooStatusTask(run:88)  - [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)
The full error Message is in the picture:
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.
        
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