Explains the error message and suggests a solution.
The error occurs when trying to run a Job in Job Conductor and you can not stop the Job by killing it. This error is usually caused by many concurrent Job executions.
To prevent this problem, increase the quartz properties threadCount property to always be greater than the max running time of the the concurrent tasks. Follow these steps:
Go to <Tomcat_install_dir>/webapps/org.talend.administrator/WEB_LIB/conf/classs/ directory and open the quartz.properties file. Search for threadCount and increase its value
org.quartz.threadPool.threadCount = 20
For example, for 30 max concurrent executions, you can set:
org.quartz.threadPool.threadCount = 30
Save the file and restart Tomcat.