Value too long for column "TEXT_ CHARACTER VARYING(4000)

@SebastianAT You can try like this:

or

Set the log levels as:

 <logger name="org.camunda.bpm.engine.cmd" level="debug" />
  <logger name="org.camunda.bpm.engine.impl.persistence.entity" level="debug" />
  <logger name="org.camunda.bpm.engine.impl.history.event" level="debug" />
  <logger name="org.camunda.bpm.engine.impl.batch.history" level="debug" />
  <logger name="org.camunda.bpm.engine.impl.batch" level="debug" />