In default jgroups-tcp.xml [1]:

<MFC max_credits="200k" min_threshold="0.20"/>
<FRAG2 frag_size="60000"/>

According to JGRP-1659 [2]:

• Either set FRAG2.frag_size to be less than MFC.min_threshold * MFC.max_credits (=40k), e.g. to 20k, or
• Increase max_credits or min_threshold, such that their product is greater than FRAG2.frag_size

Recommend updating default jgroups-tcp.xml accordingly.

[1] https://github.com/infinispan/infinispan/blob/master/core/src/main/resources/jgroups-tcp.xml
[2] https://issues.jboss.org/browse/JGRP-1659