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https://issues.apache.org/jira/browse/HADOOP-18204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17523491#comment-17523491
]
cnnc commented on HADOOP-18204:
-------------------------------
i found this bug on 3.2.0.
i checked the latest version（hadoop 3.3.2）,and this error is still here
> java.io.IOException: Version Mismatch (Expected: 28, Received: 520 )
> --------------------------------------------------------------------
>
> Key: HADOOP-18204
> URL: https://issues.apache.org/jira/browse/HADOOP-18204
> Project: Hadoop Common
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 3.3.0, 3.3.1, 3.2.3, 3.3.2
> Environment: NAME="openEuler"
> VERSION="20.03 (LTS-SP1)"
> ID="openEuler"
> VERSION_ID="20.03"
> Reporter: cnnc
> Priority: Major
> Labels: libhdfs, libhdfscpp
> Attachments: test1M.cpp
>
> Original Estimate: 504h
> Remaining Estimate: 504h
>
> read 1M bytes from hdfs with libhdfspp, and the datanode-server report an
> error like:
>
> 2022-04-12 20:10:21,872 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: server1:9866:DataXceiver
> error processing READ_BLOCK operation src: /90.90.43.114:47956 dst:
> /90.90.43.114:9866
> java.io.IOException: Version Mismatch (Expected: 28, Received: 520 )
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.readOp(Receiver.java:74)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:269)
> at java.lang.Thread.run(Thread.java:748)
> 2022-04-12 20:13:27,615 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: server1:9866:DataXceiver
> error processing READ_BLOCK operation src: /90.90.43.114:48142 dst:
> /90.90.43.114:9866
> java.io.IOException: Version Mismatch (Expected: 28, Received: 520 )
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.readOp(Receiver.java:74)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:269)
> at java.lang.Thread.run(Thread.java:748)
>
>
> (1) compile test1M.cpp ,using command:
> g++ test1M.cpp -lprotobuf -lhdfspp_static -lhdfs -lpthread -lsasl2 -lcrypto
> -llz4 -I./ -L./ -o test1M
>
> (2)and execute test1M with:
> ./test1M REAL_HDFS_FILE_PATH
>
> (3) check hadoop logs and you will find erro info like :
> java.io.IOException: Version Mismatch (Expected: 28, Received: 520 )
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.readOp(Receiver.java:74)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:269)
> at java.lang.Thread.run(Thread.java:748)
>
>
>
>
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