You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@helix.apache.org by "Lei Xia (JIRA)" <ji...@apache.org> on 2016/11/17 17:48:58 UTC
[jira] [Closed] (HELIX-540) Full-auto rebalancer not able to map
all partitions
[ https://issues.apache.org/jira/browse/HELIX-540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lei Xia closed HELIX-540.
-------------------------
Resolution: Fixed
Fix Version/s: 0.6.5
> Full-auto rebalancer not able to map all partitions
> ----------------------------------------------------
>
> Key: HELIX-540
> URL: https://issues.apache.org/jira/browse/HELIX-540
> Project: Apache Helix
> Issue Type: Bug
> Reporter: Zhen Zhang
> Fix For: 0.6.5
>
>
> We discover a bug where full-auto rebalancer not be able to mapping all partitions even when capacity is enough.
> Assuming we have 2 partition and 2 node, state model is LeaderStandby and replica is 1. For some reason, the current state mapping becomes:
> {noformat}
> partition_0:
> node_0: LEADER
> node_1: STANDBY
> {noformat}
> The extra STANDBY mapping prevents the full-auto rebalancer (AutoRebalanceStrategy#computePartitionAssignment) to assign LEADER to partition_1, so partition_1 will remain unmapped even though node capacity is enough.
> For workaround, we can disable the partition in STANDBY state on the node, thus "frees" the quota and the unmapped partition will get assigned LEADER. We can then re-enable the partition on the node.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)