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https://issues.apache.org/jira/browse/HDDS-1787?focusedWorklogId=277024&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-277024
]
ASF GitHub Bot logged work on HDDS-1787:
----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Jul/19 22:21
Start Date: 15/Jul/19 22:21
Worklog Time Spent: 10m
Work Description: xiaoyuyao commented on pull request #1094: HDDS-1787.
NPE thrown while trying to find DN closest to client.
URL: https://github.com/apache/hadoop/pull/1094#discussion_r303661158
##########
File path:
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/server/SCMBlockProtocolServer.java
##########
@@ -290,7 +290,12 @@ public ScmInfo getScmInfo() throws IOException {
NodeManager nodeManager = scm.getScmNodeManager();
Node client = nodeManager.getNode(clientMachine);
List<Node> nodeList = new ArrayList();
- nodes.stream().forEach(path -> nodeList.add(nodeManager.getNode(path)));
+ nodes.stream().forEach(path -> {
+ DatanodeDetails node = nodeManager.getNode(path);
+ if (node != null) {
Review comment:
Can you elaborate the case nodeManager.getNode() gives back null? Can we add
a WARN log for the case?
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Issue Time Tracking
-------------------
Worklog Id: (was: 277024)
Time Spent: 0.5h (was: 20m)
> NPE thrown while trying to find DN closest to client
> ----------------------------------------------------
>
> Key: HDDS-1787
> URL: https://issues.apache.org/jira/browse/HDDS-1787
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Datanode
> Affects Versions: 0.5.0
> Reporter: Siddharth Wagle
> Assignee: Sammi Chen
> Priority: Major
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> cc: [~xyao] This seems related to the client side topology changes, not sure
> if some other Jira is already addressing this.
> {code}
> 2019-07-10 16:45:53,176 WARN ipc.Server (Server.java:logException(2724)) -
> IPC Server handler 14 on 35066, call Call#127037 Retry#0
> org.apache.hadoop.hdds.scm.protocol.ScmBlockLocationProtocol.send from 17
> 2.31.116.73:52540
> java.lang.NullPointerException
> at
> org.apache.hadoop.ozone.protocolPB.ScmBlockLocationProtocolServerSideTranslatorPB.lambda$sortDatanodes$0(ScmBlockLocationProtocolServerSideTranslatorPB.java:215)
> at
> java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
> at
> java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
> at
> org.apache.hadoop.ozone.protocolPB.ScmBlockLocationProtocolServerSideTranslatorPB.sortDatanodes(ScmBlockLocationProtocolServerSideTranslatorPB.java:215)
> at
> org.apache.hadoop.ozone.protocolPB.ScmBlockLocationProtocolServerSideTranslatorPB.send(ScmBlockLocationProtocolServerSideTranslatorPB.java:124)
> at
> org.apache.hadoop.hdds.protocol.proto.ScmBlockLocationProtocolProtos$ScmBlockLocationProtocolService$2.callBlockingMethod(ScmBlockLocationProtocolProtos.java:13157)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)
> 2019-07-10 16:45:53,176 WARN om.KeyManagerImpl
> (KeyManagerImpl.java:lambda$sortDatanodeInPipeline$7(2129)) - Unable to sort
> datanodes based on distance to client, volume=xqoyzocpse, bucket=vxwajaczqh,
> key=pool-444-thread-7-201077822, client=127.0.0.1,
> datanodes=[10f15723-45d7-4a0c-8f01-8b101744a110{ip: 172.31.116.73, host:
> sid-minichaos.gce.cloudera.com, networkLocation: /default-rack, certSerialId:
> null}, 7ac2777f-0a5c-4414-9e7f-bfbc47d696ea{ip: 172.31.116.73, host:
> sid-minichaos.gce.cloudera.com, networkLocation: /default-rack, certSerialId:
> null}], exception=java.lang.NullPointerException
> at
> org.apache.hadoop.ozone.protocolPB.ScmBlockLocationProtocolServerSideTranslatorPB.lambda$sortDatanodes$0(ScmBlockLocationProtocolServerSideTranslatorPB.java:215)
> at
> java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
> at
> java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
> at
> org.apache.hadoop.ozone.protocolPB.ScmBlockLocationProtocolServerSideTranslatorPB.sortDatanodes(ScmBlockLocationProtocolServerSideTranslatorPB.java:215)
> at
> org.apache.hadoop.ozone.protocolPB.ScmBlockLocationProtocolServerSideTranslatorPB.send(ScmBlockLocationProtocolServerSideTranslatorPB.java:124)
> at
> org.apache.hadoop.hdds.protocol.proto.ScmBlockLocationProtocolProtos$ScmBlockLocationProtocolService$2.callBlockingMethod(ScmBlockLocationProtocolProtos.java:13157)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)
> {code}
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