I don't think "log4j.appender.DRFA.MaxBackupIndex" is working, even though, it is listed in the log4j-hive.properties file by default and commented in Ambari. I found out there are two options to achieve the similar goal. Option 1: Customize DailyRollingFileAppender Reference: https://wiki.apache.org/logging-log4j/DailyRollingFileAppender Option 2: Use the TimeBasedRollingPolicy of DailyRollingFileAppender Reference: https://stackoverflow.com/questions/5117758/configuring-rollingfileappender-in-log4j ... View more

IPC is a generic concept. It's not particular to Hive. In fact several hadoop service communicate this way. https://wiki.apache.org/hadoop/ipc Using IPC, clients can connect to Server components at a certain port and invoke methods exposed by a server. See properties related to ipc.client here : https://hadoop.apache.org/docs/r2.8.0/hadoop-project-dist/hadoop-common/core-default.xml ... View more

I solved the problem by adding a new hive metastore service to the same node which has no hive-log4j.properties file in /etc/hive/2.6.0.3-8/0/conf.server folder. ... View more