hg: jmc/jmc: JMC-6082: JOverflow does not handle large heap dumps well

[almacdon at redhat.com]

Changeset: 76af4214ed3a
Author:    aptmac <almacdon at redhat.com>
Date:      2019-07-17 12:53 -0400
URL:       https://hg.openjdk.java.net/jmc/jmc/rev/76af4214ed3a

JMC-6082: JOverflow does not handle large heap dumps well
Summary: Corrected CachedReadBufferFactory from closing dump files prematurely
Reviewed-by: hirt
Contributed-by: Kangcheng Xu <kxu at redhat.com>

! application/org.openjdk.jmc.joverflow/src/main/java/org/openjdk/jmc/joverflow/heap/parser/ReadBuffer.java