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Tsz Wo Nicholas Sze commented on HDFS-9036: ------------------------------------------- The patch looks good. Thanks. > In BlockPlacementPolicyWithNodeGroup#chooseLocalStorage , random node is > selected eventhough fallbackToLocalRack is true. > ------------------------------------------------------------------------------------------------------------------------- > > Key: HDFS-9036 > URL: https://issues.apache.org/jira/browse/HDFS-9036 > Project: Hadoop HDFS > Issue Type: Bug > Reporter: J.Andreina > Assignee: J.Andreina > Attachments: HDFS-9036.1.patch, HDFS-9036.2.patch > > > For example in below clusterMap > Writer = "/d2/r4/n8" which does not have local node. > Available nodes rack = {"/d2/r4/n7","/d1/r1/n1","/d1/r2/n3","/d2/r3/n6"} > Current hierarchy in choosing node for first local storage replica is > 1. Choose local machine (Not available) > 2. Choose Local node group machine (Not available) > 3. choose random > *But instead of choosing random , should choose localrack node first(if > fallbackToLocalRack is true, in example it is "/d2/r4/n7" ) else should go > for radom node* -- This message was sent by Atlassian JIRA (v6.3.4#6332)