jiajunwang opened a new issue #940: Full auto rebalancer with CrushEd algorithm changed partition assignment unexpected. URL: https://github.com/apache/helix/issues/940 It was reported and verified that the current full auto rebalancer with CrushEd strategy may change partition assignment if the rebalance is triggered rapidly (2 or 3 times per second). This caused unexpected partition shuffling. Till now, based on our investigation, the problem might be related to the unstable map key iterator in Java 8 or after. Since this usually happens with a short while, it might be overlooked since we bump up JDK version. We plan to fix it while ensuring the algorithm's backward compatibility.
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