Posted by ErmanArslansOracleBlog on Jan 16, 2020; 12:24pm URL: http://erman-arslan-s-oracle-forum.124.s1.nabble.com/java-lang-OutOfMemoryError-Java-heap-space-tp8011p8012.html
This is about heap space of that concurrent program.
Update the problematic concurrent program's arguments as;
-Xms2048M -Xmx3096M