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https://issues.apache.org/jira/browse/HDFS-14849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16929912#comment-16929912
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Ayush Saxena edited comment on HDFS-14849 at 9/15/19 6:16 AM:
--------------------------------------------------------------
Thanx [~marvelrock] for the patch, Got the change. The decommissioned one gets
added first and then when the live one comes, it is marked as redundant. Seems
fair enough to check state first. Fix LGTM. if there aren't any test failures!!!
For the test :
{code:java}
// ec policy
756 ECSchema rsSchema = new ECSchema("rs", 3, 2);
757 String policyName = "RS-3-2-128k";
758 int cellSize = 128 * 1024;
759 ErasureCodingPolicy ecPolicy =
760 new ErasureCodingPolicy(policyName, rsSchema, cellSize, (byte)
-1);
{code}
You may instead use directly :
{code:java}
// RS-3-2 EC policy
ErasureCodingPolicy ecPolicy =
SystemErasureCodingPolicies.getPolicies().get(1);
{code}
Anyway it would be good, if you add some more details in the description
was (Author: ayushtkn):
Thanx [~marvelrock] for the patch, Got the change. The decommissioned one gets
added first and then when the live one comes, it is marked as redundant. Seems
fair enough to check state first. Fix LGTM.
For the test :
{code:java}
// ec policy
756 ECSchema rsSchema = new ECSchema("rs", 3, 2);
757 String policyName = "RS-3-2-128k";
758 int cellSize = 128 * 1024;
759 ErasureCodingPolicy ecPolicy =
760 new ErasureCodingPolicy(policyName, rsSchema, cellSize, (byte)
-1);
{code}
You may instead use directly :
{code:java}
// RS-3-2 EC policy
ErasureCodingPolicy ecPolicy =
SystemErasureCodingPolicies.getPolicies().get(1);
{code}
> Erasure Coding: replicate block infinitely when datanode being decommissioning
> ------------------------------------------------------------------------------
>
> Key: HDFS-14849
> URL: https://issues.apache.org/jira/browse/HDFS-14849
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.3.0
> Reporter: HuangTao
> Assignee: HuangTao
> Priority: Major
> Labels: EC, HDFS, NameNode
> Attachments: HDFS-14849.001.patch
>
>
> When the datanode keeping in DECOMMISSION_INPROGRESS status, the EC block in
> that datanode will be replicated infinitely.
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