KNIME SERVER INSTABILITY

**atosuser** · May 22, 2019, 2:21pm

Hi,

On my Knime server installed on an Azure VM, although the Apache service is set to auto-install, I can see it crash once in about a week. Looking at the catalina log file, I do not see any error message,just 3 warning messages:
22-May-2019 12:27:13.447 WARNING [https-jsse-nio2-8443-exec-12] org.apache.cxf.jaxrs.model.OperationResourceInfoComparator.compare Both com.knime.enterprise.server.rest.impl.v4.jobs.JobImpl#executeJob and com.knime.enterprise.server.rest.impl.v4.jobs.JobImpl#executeJob are equal candidates for handling the current request which can lead to unpredictable results

22-May-2019 12:32:55.967 WARNING [https-jsse-nio2-8443-exec-3] org.apache.cxf.jaxrs.model.OperationResourceInfoComparator.compare Both com.knime.enterprise.server.rest.impl.v4.jobs.JobImpl#executeJob and com.knime.enterprise.server.rest.impl.v4.jobs.JobImpl#executeJob are equal candidates for handling the current request which can lead to unpredictable results

22-May-2019 12:40:46.969 WARNING [https-jsse-nio2-8443-exec-8] org.apache.cxf.jaxrs.model.OperationResourceInfoComparator.compare Both com.knime.enterprise.server.rest.impl.v4.jobs.JobImpl#executeJob and com.knime.enterprise.server.rest.impl.v4.jobs.JobImpl#executeJob are equal candidates for handling the current request which can lead to unpredictable results

It will be helpful if somebidy could help me point out what might be causing this issue.

Thanks.

**jonfuller** · May 22, 2019, 2:51pm

Could it be that there are two versions of the knime.war in /webapps/?

**atosuser** · May 23, 2019, 8:08am

Hi Jon,

I just checked - so there is one knime.war in /webapps/ and a war folder within /webapps/knime/WEB-INF/classes/com/knime/enterprise.

Please can you suggest where else should I be looking for a possible cause of the issue.

Thanks.

**thor** · May 23, 2019, 11:35am

These messages are warnings and have nothing to do with instabilities. What exactly do you “see” that makes you believe the KNIME Server crashes?

**atosuser** · May 23, 2019, 11:42am

The web portal became unreachable. My Knime server is running in a Azure VM and is accessed through a Guacamole URL. I did the auto-install of Apache server on this VM last week and till yesterday it was running fine when I saw the URL showing below -

The Azure VM is set up to run continuously as we are in a development phase, backups have been shut down on it as well so I wouldn’t suspect the machine to reboot.

Upon checking in the catalina log, I could only see warning messages, no error messages.

Thanks.

**thor** · May 23, 2019, 7:21pm

This error message (ERR_TUNNEL_CONNECTION_FAILED) indicates a proxy or network problem and very likely not an issue with the KNIME Server itself. Especially if you don’t see any error messages in the server logs.