Github user bhatsachin commented on the pull request:
https://github.com/apache/flink/pull/553#issuecomment-99786510
Hey Robert, please correct me if I am wrong. According to this doc,
https://docs.oracle.com/javase/7/docs/jre/api/management/extension/com/sun/management/OperatingSystemMXBean.html
OperatingSystemMXBean of the sun package is available for Java 6 too. Only
the method getProcessCpuTime is unavailable. Hence I believe the logging and
exception will not occur for each heartbeat.
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