tree cd70b054b610ffe9fd1cfc479223e858c8dd2f58
parent 2fcc6fd625aa2902f423edaf8ddc3d98e3470b5f
author Vladimir Sitnikov <sitnikov.vladimir@gmail.com> 1688130743 +0300
committer Vladimir Sitnikov <sitnikov.vladimir@gmail.com> 1688198965 +0300

fix: treat null or blank values as empty for saved properties

It turned out it was impossible to modify element while iterating over its
properties since ReentrantReadWriteLock is not upgradable in Java.

So this commit adds upgrading locks for writeLock paths

Fixes https://github.com/apache/jmeter/issues/6026
See https://www.javaspecialists.eu/archive/Issue279-Upgrading-ReadWriteLock.html>Issue279-Upgrading-ReadWriteLock