Symptoms
Symptom 1
When executing a Service Manager script in the <APPIAN_HOME>/services/bin directory, the following error is returned:
Exception thrown while attempting to retrieve process info for java process with main Class name QuorumPeerMain. java.io.IOException: Cannot run program "jps": error=2, No such file or directory
...
Caused by: java.io.IOException: error=2, No such file or directory
Symptom 2
Zookeeper service initially starts successfully as per the <APPIAN_HOME>\logs\service-manager\zookeeper\zookeeper.log:
2019-01-22 21:01:44,744 [myid:1] - INFO [main:NIOServerCnxnFactory@89] - binding to port 0.0.0.0/0.0.0.0:2181
2019-01-22 21:01:44,747 [myid:1] - INFO [main:QuorumPeer@1158] - tickTime set to 2000
However, Zookeeper then errors out immediately with the following error in the <APPIAN_HOME>\logs\service-manager\zookeeper\zookeeper.log:
2019-01-22 21:02:04,966 [myid:1] - INFO [main:NIOServerCnxnFactory@89] - binding to port 0.0.0.0/0.0.0.0:2181
2019-01-22 21:02:04,967 [myid:1] - ERROR [main:QuorumPeerMain@92] - Unexpected exception, exiting abnormally
java.net.BindException: Address already in use
Cause
There are two possible causes for this issue.
- If you are using Oracle Java, this error is returned when the
JAVA_HOME path is set to JRE, rather than JDK. As per the Appian System Requirements, JDK is the supported option. To check the JAVA_HOME variable:
- In Windows, right click My Computer and select Properties. On the Advanced tab, select Environment Variables, and edit
JAVA_HOME to view the JDK path.
- In Linux, type
echo $JAVA_HOME in a terminal to view the Java path.
- If you are using OpenJDK, the basic download of OpenJDK does not ship with JPS.
Action
- To resolve the issue, follow the Appian Installation Prerequisites documentation to set up the
JAVA_HOME and PATH variables to point to the JDK. If using OpenJDK, ensure that the developer edition is being used.
- Ensure the Appian user has appropriate permissions to run
jps command.
Affected Versions
This article applies to Appian 17.3 and later.
Last Reviewed: February 2019