Heap dump shows memory accumulation in one instance of org.jgroups.protocols.FRAG3

Solution Unverified - Updated 4 Mar 2020

Environment

Red Hat Data Grid

Issue

java.lang.OutOfMemoryError: Java heap space
Heap dump analysis shows retention in a single instance of org.jgroups.protocols.FRAG3 that is a Java Local:

Class Name                                                                                    | Shallow Heap | Retained Heap
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java.lang.Thread @ 0xe5036ee0  jgroups-12345 Thread|          120 |        11,600
|- <class> class java.lang.Thread @ 0x60046060 System Class                                   |           40 |           184
|- group java.lang.ThreadGroup @ 0x40000528  main                                             |           48 |         4,256
|- contextClassLoader org.jboss.modules.ModuleClassLoader @ 0x41005dc0                        |           88 |         6,120
|- <Java Local> org.jgroups.protocols.FRAG3 @ 0x21eea7c8                                      |           72 | 1,234,567,890
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