HDFS-17872. Propagate tolerancePercentage to DataNode in DiskBalancer…#8335
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deepujain wants to merge 1 commit intoapache:trunkfrom
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HDFS-17872. Propagate tolerancePercentage to DataNode in DiskBalancer…#8335deepujain wants to merge 1 commit intoapache:trunkfrom
deepujain wants to merge 1 commit intoapache:trunkfrom
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💔 -1 overall
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The unit -1 is in TestBlockRecoveryCauseStandbyNameNodeCrash, which is unrelated to this DiskBalancer change. |
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Summary
dfs.disk.balancer.block.tolerance.percentis documented and used on the DataNode when executing a plan, but the plan command did not set tolerance percentage on plan steps. So the value sent to the DataNode was effectively the step default (0) unless the DataNode fell back to its own config. This change reads the config in the plan command and setstolerancePercenton each step so the plan propagated to the DataNode uses the same value.Change
setPlanParams(), readdfs.disk.balancer.block.tolerance.percentfrom configuration (default 10) and callstep.setTolerancePercent(tolerancePercent)for each step in each plan. So generated plans include tolerance and the DataNode receives it (it already usesstep.getTolerancePercent()when building work items).testPlanStepTolerancePercentInJson(): build a NodePlan with a MoveStep that hassetTolerancePercent(15), serialize to JSON, parse back, and assert the step’sgetTolerancePercent()is 15 (HDFS-17872).JIRA
Fixes HDFS-17872