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Review request for mesos. Repository: mesos-git Description ------- Fixed bug where active TaskTrackers are killed. Sometimes, TaskTrackers which are active will fail to get marked as such because the scheduler is either a) too busy or b) has not received any offers in a while. This resolves the problem of TaskTrackers getting killed by the launch timeout even though they are alive and well. Furthermore, some parts of the scheduler don't need to be completely synchronized because they don't modify shared data. Diffs ----- hadoop/mesos/src/java/org/apache/hadoop/mapred/MesosScheduler.java 1923d498121f1ff4e875d9685ed66de2b7fb22ec Diff: https://reviews.apache.org/r/13211/diff/ Testing ------- Used in production at Airbnb. make check && cd hadoop && make hadoop-2.0.0-mr1-cdh4.2.1 Thanks, Brenden Matthews
