tree 6b0df03e04bb50d95932673faaf5db209591e511
parent d609c002c38032f55c915c72434ae1443604461b
author Julia Wang <juliaw@apache.org> 1501121057 -0700
committer Sergiy Matusevych <motus@apache.org> 1504133391 -0700

[REEF-1842]  Making IMRU task and input data association deterministic

   * Use partitionDescriptor id as part of the context id so that context id is associated with a fixed partitionDescriptor. Please notice that the partition descriptor id always follows the pattern like RandomInputPartition-x and is unique
   * Make contexts stored in a sorted collection to ensure tasks with associated context/partitionDescriptor are always add to group in the same sequence.

JIRA: [REEF-1842](https://issues.apache.org/jira/browse/REEF-1842)

This closes #1346