I have implemented a data migration using Talend. It reads from MSSQL, transforms and writes to Oracle and some log files. The application works principally. Several sub jobs are executed in parallel
However sometimes it simply freezes after start, without logging an error. The "begin" log lines are logged.
This is not reproducible. When restarted the migration works usually. However this is a major issue because I have to use a script which calls the java application several times with different parameters. This should run without supervision.
I have no idea how to approach this problem. The logs show no error. Monitoring with Task Manager and Java VisualVM shows no memory problems.
Any ideas about how to approach this problem would be greatly appreciated.
