HBase PreCommit builds frequently gave us NumberFormatException.
From hadoop 0.20.205 source code, looks like ppid was 18446743988060683582, causing NFE:
You can find information on the OS at the beginning of https://builds.apache.org/job/PreCommit-HBASE-Build/553/console:
From Nicolas Sze:
I propose changing allProcessInfo to Map<String, ProcessInfo> so that we don't encounter this problem by avoiding parsing large integer.