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Engine start-up fails while running Appian on RHEL 7.4 and 7.5. Although port 2181 is free, the following error is found in zookeeper.log located in <APPIAN_HOME>/logs/service-manager/zookeeper/:
<APPIAN_HOME>/logs/service-manager/zookeeper/
2018-08-20 04:46:51,819 [myid:] - ERROR [main:ZooKeeperServerMain@66] - Unexpected exception, exiting abnormally java.net.BindException: Address already in use
After running the start command, engine start-up has the following error on command line prompt:
waiting for process QuorumPeerMain waiting for process QuorumPeerMain process QuorumPeerMain not running after 10000 seconds Unable to start service QuorumPeerMain java.util.concurrent.TimeoutException: Process QuorumPeerMain did not launch within 10000 ms
This error is caused on RHEL 7.4 and RHEL 7.5 version.
Check the server version and switch to RHEL 6.X or lower.
This article applies to Appian 17.3 and later.
Last Reviewed: August 2018