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Please see the Installation pages for your particular deployment to determine how to set an appropriate Java heap size, and what that size should be.

Unhelpful logging information from exception traces.

The default logging provifded in logback.xml is for a truncated information from exceptions.  Particularly when debugging a development system it may be helpful to turn up the amount of information in the log. This page has mpore details but replacing this line in logback.xml

            <Pattern>%date{ISO8601} - %level [%logger:%line] - %msg%n%ex{short}</Pattern>

with

            <Pattern>%date{ISO8601} - %level [%logger:%line] - %msg%n%ex{full}</Pattern>

Can often provide a useful hint of where the fault has come from