Hi, please review this change for test sun/tools/jcmd/TestProcessHelper.java to make it more robust.
Bug: https://bugs.openjdk.java.net/browse/JDK-8230850 Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8230850.0/ This Linux only test is starting several Java processes and then tries to figure out the main class by invoking jdk.jcmd's linux specific ProcessHelper implementation which parses the contents of /proc/<pid>/cmdline. Under some circumstances, the test already attempts to read /proc/<pid>/cmdline before it actually exists or is filled with data. This can be fixed with some sleeps/retries to wait for that data to be ready. In the actual jcmd tool, such behavior of ProcessHelper. getMainClass should not be an issue because it is handled in ProcessArgumentMatcher [0]. Thanks Christoph [0] http://hg.openjdk.java.net/jdk/jdk/file/8b08eaf9a0eb/src/jdk.jcmd/share/classes/sun/tools/common/ProcessArgumentMatcher.java#l86
