I have a Spring boot application using HBase Java client, version 2.1.0-cdh6.1.1, connect to a Hbase with kerberos. When running a tomcat instance in our server, a simple query could take 5 minutes to complete and timeout found in log file.  I can't find out what's wrong. Connection configuration:     config.set("hbase.zookeeper.quorum", quorum); config.set("hbase.zookeeper.clientPort", "2181"); config.set("hadoop.security.authentication", "kerberos"); config.set("hbase.security.authentication", "kerberos"); config.set("hbase.cluster.distributed", "true"); config.set("hbase.rpc.protection", "privacy"); config.set("hbase.regionserver.kerberos.principal", "hbase/_HOST@mycompany.com"); config.set("hbase.master.kerberos.principal", "hbase/_HOST@mycompany.com"); config.set("hbase.client.retries.number", "3"); config.set("hbase.client.pause", "500"); config.set("zookeeper.recovery.retry", "1"); System.setProperty("java.security.krb5.conf",ResourceUtils.getFile("classpath:krb5.conf").getPath()); File file = ResourceUtils.getFile(keytabFileLocation); UserGroupInformation.setConfiguration(config); UserGroupInformation.loginUserFromKeytab(userIdEmail, file.getPath()); Connection conn = ConnectionFactory.createConnection(config);       here is a one minute gap from 17:23:42,637 to 17:24:43,126 in log file, then the time out at the end. How to fix this issue? Thank you                             ... View more