[jira] [Commented] (HDFS-17298) Fix NPE in DataNode.handleBadBlock and BlockSender
[ https://issues.apache.org/jira/browse/HDFS-17298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17800474#comment-17800474 ] ASF GitHub Bot commented on HDFS-17298: --- haiyang1987 commented on PR #6374: URL: https://github.com/apache/hadoop/pull/6374#issuecomment-1869479408 Thanks @tasanuma for you review and merge! > Fix NPE in DataNode.handleBadBlock and BlockSender > -- > > Key: HDFS-17298 > URL: https://issues.apache.org/jira/browse/HDFS-17298 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode >Reporter: Haiyang Hu >Assignee: Haiyang Hu >Priority: Major > Labels: pull-request-available > Fix For: 3.4.0, 3.3.9 > > > There are some NPE issues on the DataNode side of our online environment. > The detailed exception information is > {code:java} > 2023-12-20 13:58:25,449 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client DFSClient_NONMAPREDUCE_xxx at /xxx:41452 [Sending > block BP-xxx:blk_xxx]] - xxx:50010:DataXceiver error processing READ_BLOCK > operation src: /xxx:41452 dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.BlockSender.(BlockSender.java:301) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:607) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:152) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:104) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > if (!fromScanner && blockScanner.isEnabled()) { > // data.getVolume(block) is null > blockScanner.markSuspectBlock(data.getVolume(block).getStorageID(), > block); > } > {code} > {code:java} > 2023-12-20 13:52:18,844 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client /xxx:61052 [Copying block BP-xxx:blk_xxx]] - > xxx:50010:DataXceiver error processing COPY_BLOCK operation src: /xxx:61052 > dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.DataNode.handleBadBlock(DataNode.java:4045) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.copyBlock(DataXceiver.java:1163) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opCopyBlock(Receiver.java:291) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:113) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > // Obtain a reference before reading data > volumeRef = datanode.data.getVolume(block).obtainReference(); > //datanode.data.getVolume(block) is null > {code} > We need to fix it. -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Commented] (HDFS-17298) Fix NPE in DataNode.handleBadBlock and BlockSender
[ https://issues.apache.org/jira/browse/HDFS-17298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17800390#comment-17800390 ] ASF GitHub Bot commented on HDFS-17298: --- tasanuma commented on PR #6374: URL: https://github.com/apache/hadoop/pull/6374#issuecomment-1869169552 Merged. Thanks for your PR, @haiyang1987! > Fix NPE in DataNode.handleBadBlock and BlockSender > -- > > Key: HDFS-17298 > URL: https://issues.apache.org/jira/browse/HDFS-17298 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode >Reporter: Haiyang Hu >Assignee: Haiyang Hu >Priority: Major > Labels: pull-request-available > > There are some NPE issues on the DataNode side of our online environment. > The detailed exception information is > {code:java} > 2023-12-20 13:58:25,449 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client DFSClient_NONMAPREDUCE_xxx at /xxx:41452 [Sending > block BP-xxx:blk_xxx]] - xxx:50010:DataXceiver error processing READ_BLOCK > operation src: /xxx:41452 dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.BlockSender.(BlockSender.java:301) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:607) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:152) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:104) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > if (!fromScanner && blockScanner.isEnabled()) { > // data.getVolume(block) is null > blockScanner.markSuspectBlock(data.getVolume(block).getStorageID(), > block); > } > {code} > {code:java} > 2023-12-20 13:52:18,844 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client /xxx:61052 [Copying block BP-xxx:blk_xxx]] - > xxx:50010:DataXceiver error processing COPY_BLOCK operation src: /xxx:61052 > dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.DataNode.handleBadBlock(DataNode.java:4045) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.copyBlock(DataXceiver.java:1163) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opCopyBlock(Receiver.java:291) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:113) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > // Obtain a reference before reading data > volumeRef = datanode.data.getVolume(block).obtainReference(); > //datanode.data.getVolume(block) is null > {code} > We need to fix it. -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Commented] (HDFS-17298) Fix NPE in DataNode.handleBadBlock and BlockSender
[ https://issues.apache.org/jira/browse/HDFS-17298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17800389#comment-17800389 ] ASF GitHub Bot commented on HDFS-17298: --- tasanuma merged PR #6374: URL: https://github.com/apache/hadoop/pull/6374 > Fix NPE in DataNode.handleBadBlock and BlockSender > -- > > Key: HDFS-17298 > URL: https://issues.apache.org/jira/browse/HDFS-17298 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode >Reporter: Haiyang Hu >Assignee: Haiyang Hu >Priority: Major > Labels: pull-request-available > > There are some NPE issues on the DataNode side of our online environment. > The detailed exception information is > {code:java} > 2023-12-20 13:58:25,449 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client DFSClient_NONMAPREDUCE_xxx at /xxx:41452 [Sending > block BP-xxx:blk_xxx]] - xxx:50010:DataXceiver error processing READ_BLOCK > operation src: /xxx:41452 dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.BlockSender.(BlockSender.java:301) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:607) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:152) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:104) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > if (!fromScanner && blockScanner.isEnabled()) { > // data.getVolume(block) is null > blockScanner.markSuspectBlock(data.getVolume(block).getStorageID(), > block); > } > {code} > {code:java} > 2023-12-20 13:52:18,844 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client /xxx:61052 [Copying block BP-xxx:blk_xxx]] - > xxx:50010:DataXceiver error processing COPY_BLOCK operation src: /xxx:61052 > dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.DataNode.handleBadBlock(DataNode.java:4045) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.copyBlock(DataXceiver.java:1163) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opCopyBlock(Receiver.java:291) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:113) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > // Obtain a reference before reading data > volumeRef = datanode.data.getVolume(block).obtainReference(); > //datanode.data.getVolume(block) is null > {code} > We need to fix it. -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Commented] (HDFS-17298) Fix NPE in DataNode.handleBadBlock and BlockSender
[ https://issues.apache.org/jira/browse/HDFS-17298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17800055#comment-17800055 ] ASF GitHub Bot commented on HDFS-17298: --- haiyang1987 commented on PR #6374: URL: https://github.com/apache/hadoop/pull/6374#issuecomment-1868296548 Hi @ayushtkn @Hexiaoqiao @ZanderXu @tasanuma @zhangshuyan0 Could you please help me review this pr when you have free time ? Thank you very much. > Fix NPE in DataNode.handleBadBlock and BlockSender > -- > > Key: HDFS-17298 > URL: https://issues.apache.org/jira/browse/HDFS-17298 > Project: Hadoop HDFS > Issue Type: Bug >Reporter: Haiyang Hu >Assignee: Haiyang Hu >Priority: Major > Labels: pull-request-available > > There are some NPE issues on the DataNode side of our online environment. > The detailed exception information is > {code:java} > 2023-12-20 13:58:25,449 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client DFSClient_NONMAPREDUCE_xxx at /xxx:41452 [Sending > block BP-xxx:blk_xxx]] - xxx:50010:DataXceiver error processing READ_BLOCK > operation src: /xxx:41452 dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.BlockSender.(BlockSender.java:301) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:607) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:152) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:104) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > if (!fromScanner && blockScanner.isEnabled()) { > // data.getVolume(block) is null > blockScanner.markSuspectBlock(data.getVolume(block).getStorageID(), > block); > } > {code} > {code:java} > 2023-12-20 13:52:18,844 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client /xxx:61052 [Copying block BP-xxx:blk_xxx]] - > xxx:50010:DataXceiver error processing COPY_BLOCK operation src: /xxx:61052 > dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.DataNode.handleBadBlock(DataNode.java:4045) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.copyBlock(DataXceiver.java:1163) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opCopyBlock(Receiver.java:291) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:113) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > // Obtain a reference before reading data > volumeRef = datanode.data.getVolume(block).obtainReference(); > //datanode.data.getVolume(block) is null > {code} > We need to fix it. -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Commented] (HDFS-17298) Fix NPE in DataNode.handleBadBlock and BlockSender
[ https://issues.apache.org/jira/browse/HDFS-17298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17799809#comment-17799809 ] ASF GitHub Bot commented on HDFS-17298: --- hadoop-yetus commented on PR #6374: URL: https://github.com/apache/hadoop/pull/6374#issuecomment-1867593766 :broken_heart: **-1 overall** | Vote | Subsystem | Runtime | Logfile | Comment | |::|--:|:|::|:---:| | +0 :ok: | reexec | 0m 51s | | Docker mode activated. | _ Prechecks _ | | +1 :green_heart: | dupname | 0m 1s | | No case conflicting files found. | | +0 :ok: | codespell | 0m 0s | | codespell was not available. | | +0 :ok: | detsecrets | 0m 0s | | detect-secrets was not available. | | +1 :green_heart: | @author | 0m 0s | | The patch does not contain any @author tags. | | -1 :x: | test4tests | 0m 0s | | The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch. | _ trunk Compile Tests _ | | +1 :green_heart: | mvninstall | 46m 19s | | trunk passed | | +1 :green_heart: | compile | 1m 23s | | trunk passed with JDK Ubuntu-11.0.21+9-post-Ubuntu-0ubuntu120.04 | | +1 :green_heart: | compile | 1m 14s | | trunk passed with JDK Private Build-1.8.0_392-8u392-ga-1~20.04-b08 | | +1 :green_heart: | checkstyle | 1m 13s | | trunk passed | | +1 :green_heart: | mvnsite | 1m 23s | | trunk passed | | +1 :green_heart: | javadoc | 1m 9s | | trunk passed with JDK Ubuntu-11.0.21+9-post-Ubuntu-0ubuntu120.04 | | +1 :green_heart: | javadoc | 1m 38s | | trunk passed with JDK Private Build-1.8.0_392-8u392-ga-1~20.04-b08 | | +1 :green_heart: | spotbugs | 3m 20s | | trunk passed | | +1 :green_heart: | shadedclient | 41m 11s | | branch has no errors when building and testing our client artifacts. | _ Patch Compile Tests _ | | +1 :green_heart: | mvninstall | 1m 11s | | the patch passed | | +1 :green_heart: | compile | 1m 16s | | the patch passed with JDK Ubuntu-11.0.21+9-post-Ubuntu-0ubuntu120.04 | | +1 :green_heart: | javac | 1m 16s | | the patch passed | | +1 :green_heart: | compile | 1m 9s | | the patch passed with JDK Private Build-1.8.0_392-8u392-ga-1~20.04-b08 | | +1 :green_heart: | javac | 1m 9s | | the patch passed | | +1 :green_heart: | blanks | 0m 1s | | The patch has no blanks issues. | | +1 :green_heart: | checkstyle | 1m 1s | | the patch passed | | +1 :green_heart: | mvnsite | 1m 16s | | the patch passed | | +1 :green_heart: | javadoc | 0m 56s | | the patch passed with JDK Ubuntu-11.0.21+9-post-Ubuntu-0ubuntu120.04 | | +1 :green_heart: | javadoc | 1m 30s | | the patch passed with JDK Private Build-1.8.0_392-8u392-ga-1~20.04-b08 | | +1 :green_heart: | spotbugs | 3m 22s | | the patch passed | | +1 :green_heart: | shadedclient | 40m 19s | | patch has no errors when building and testing our client artifacts. | _ Other Tests _ | | +1 :green_heart: | unit | 248m 15s | | hadoop-hdfs in the patch passed. | | +1 :green_heart: | asflicense | 0m 40s | | The patch does not generate ASF License warnings. | | | | 400m 44s | | | | Subsystem | Report/Notes | |--:|:-| | Docker | ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6374/1/artifact/out/Dockerfile | | GITHUB PR | https://github.com/apache/hadoop/pull/6374 | | Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets | | uname | Linux 034b1ce6d5d0 5.15.0-88-generic #98-Ubuntu SMP Mon Oct 2 15:18:56 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux | | Build tool | maven | | Personality | dev-support/bin/hadoop.sh | | git revision | trunk / b68523c5b8ffd0a34fd658410803b5ca923ba6ce | | Default Java | Private Build-1.8.0_392-8u392-ga-1~20.04-b08 | | Multi-JDK versions | /usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.21+9-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_392-8u392-ga-1~20.04-b08 | | Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6374/1/testReport/ | | Max. process+thread count | 2269 (vs. ulimit of 5500) | | modules | C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs | | Console output | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6374/1/console | | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 | | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org | This mes
[jira] [Commented] (HDFS-17298) Fix NPE in DataNode.handleBadBlock and BlockSender
[ https://issues.apache.org/jira/browse/HDFS-17298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17799663#comment-17799663 ] ASF GitHub Bot commented on HDFS-17298: --- haiyang1987 opened a new pull request, #6374: URL: https://github.com/apache/hadoop/pull/6374 ### Description of PR https://issues.apache.org/jira/browse/HDFS-17298 There are some NPE issues on the DataNode side of our online environment. The detailed exception information is ``` 2023-12-20 13:58:25,449 ERROR datanode.DataNode (DataXceiver.java:run(330)) [DataXceiver for client DFSClient_NONMAPREDUCE_xxx at /xxx:41452 [Sending block BP-xxx:blk_xxx]] - xxx:50010:DataXceiver error processing READ_BLOCK operation src: /xxx:41452 dst: /xxx:50010 java.lang.NullPointerException at org.apache.hadoop.hdfs.server.datanode.BlockSender.(BlockSender.java:301) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:607) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:152) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:104) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) at java.lang.Thread.run(Thread.java:748) ``` NPE Code logic: ``` if (!fromScanner && blockScanner.isEnabled()) { // data.getVolume(block) is null blockScanner.markSuspectBlock(data.getVolume(block).getStorageID(), block); } ``` ``` 2023-12-20 13:52:18,844 ERROR datanode.DataNode (DataXceiver.java:run(330)) [DataXceiver for client /xxx:61052 [Copying block BP-xxx:blk_xxx]] - xxx:50010:DataXceiver error processing COPY_BLOCK operation src: /xxx:61052 dst: /xxx:50010 java.lang.NullPointerException at org.apache.hadoop.hdfs.server.datanode.DataNode.handleBadBlock(DataNode.java:4045) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.copyBlock(DataXceiver.java:1163) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opCopyBlock(Receiver.java:291) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:113) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) at java.lang.Thread.run(Thread.java:748) ``` NPE Code logic: ``` // Obtain a reference before reading data volumeRef = datanode.data.getVolume(block).obtainReference(); //datanode.data.getVolume(block) is null We need to fix it. ``` > Fix NPE in DataNode.handleBadBlock and BlockSender > -- > > Key: HDFS-17298 > URL: https://issues.apache.org/jira/browse/HDFS-17298 > Project: Hadoop HDFS > Issue Type: Bug >Reporter: Haiyang Hu >Assignee: Haiyang Hu >Priority: Major > > There are some NPE issues on the DataNode side of our online environment. > The detailed exception information is > {code:java} > 2023-12-20 13:58:25,449 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client DFSClient_NONMAPREDUCE_xxx at /xxx:41452 [Sending > block BP-xxx:blk_xxx]] - xxx:50010:DataXceiver error processing READ_BLOCK > operation src: /xxx:41452 dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.BlockSender.(BlockSender.java:301) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:607) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:152) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:104) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:298) > at java.lang.Thread.run(Thread.java:748) > {code} > NPE Code logic: > {code:java} > if (!fromScanner && blockScanner.isEnabled()) { > // data.getVolume(block) is null > blockScanner.markSuspectBlock(data.getVolume(block).getStorageID(), > block); > } > {code} > {code:java} > 2023-12-20 13:52:18,844 ERROR datanode.DataNode (DataXceiver.java:run(330)) > [DataXceiver for client /xxx:61052 [Copying block BP-xxx:blk_xxx]] - > xxx:50010:DataXceiver error processing COPY_BLOCK operation src: /xxx:61052 > dst: /xxx:50010 > java.lang.NullPointerException > at > org.apache.hadoop.hdfs.server.datanode.DataNode.handleBadBlock(DataNode.java:4045) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.copyBlock(DataXceiver.java:1163) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opCopyBlock(Receiver.java:291) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:113) > at > org.apache.hadoop.hdfs.s