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HBase故障排除

MapReduce服务 MRS-在集群内节点使用LoadIncrementalHFiles批量导入数据，报错权限不足:问题

问题在普通集群中手动创建Linux用户，并使用集群内DataNode节点执行批量导入时，为什么LoadIncrementalHFiles工具执行失败报“Permission denied”的异常？ 2020-09-20 14:53:53,808 WARN [main] shortcircuit.DomainSocketFactory: error creating DomainSocketjava.net.ConnectException: connect(2) error: Permission denied when trying to connect to '/var/run/ FusionInsight -HDFS/dn_socket'at org.apache.hadoop.net.unix.DomainSocket.connect0(Native Method)at org.apache.hadoop.net.unix.DomainSocket.connect(DomainSocket.java:256)at org.apache.hadoop.hdfs.shortcircuit.DomainSocketFactory.createSocket(DomainSocketFactory.java:168)at org.apache.hadoop.hdfs.client.impl.BlockReaderFactory.nextDomainPeer(BlockReaderFactory.java:804)at org.apache.hadoop.hdfs.client.impl.BlockReaderFactory.createShortCircuitReplicaInfo(BlockReaderFactory.java:526)at org.apache.hadoop.hdfs.shortcircuit.ShortCircuitCache.create(ShortCircuitCache.java:785)at org.apache.hadoop.hdfs.shortcircuit.ShortCircuitCache.fetchOrCreate(ShortCircuitCache.java:722)at org.apache.hadoop.hdfs.client.impl.BlockReaderFactory.getBlockReaderLocal(BlockReaderFactory.java:483)at org.apache.hadoop.hdfs.client.impl.BlockReaderFactory.build(BlockReaderFactory.java:360)at org.apache.hadoop.hdfs.DFSInputStream.getBlockReader(DFSInputStream.java:663)at org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:594)at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:776)at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:845)at java.io.DataInputStream.readFully(DataInputStream.java:195)at org.apache.hadoop.hbase.io.hfile.FixedFileTrailer.readFromStream(FixedFileTrailer.java:401)at org.apache.hadoop.hbase.io.hfile.HFile.isHFileFormat(HFile.java:651)at org.apache.hadoop.hbase.io.hfile.HFile.isHFileFormat(HFile.java:634)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.visitBulkHFiles(LoadIncrementalHFiles.java:1090)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.discoverLoadQueue(LoadIncrementalHFiles.java:1006)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.prepareHFileQueue(LoadIncrementalHFiles.java:257)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.doBulkLoad(LoadIncrementalHFiles.java:364)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.run(LoadIncrementalHFiles.java:1263)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.run(LoadIncrementalHFiles.java:1276)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.run(LoadIncrementalHFiles.java:1311)at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)at org.apache.hadoop.hbase.tool.LoadIncrementalHFiles.main(LoadIncrementalHFiles.java:1333)

MapReduce服务 MRS HBase故障排除
MapReduce服务 MRS-在集群内节点使用LoadIncrementalHFiles批量导入数据，报错权限不足:回答

回答如果LoadIncrementalHFiles工具依赖的Client在集群内安装，且和DataNode在相同的节点上，在工具执行过程中HDFS会创建短路读提高性能。短路读依赖“/var/run/FusionInsight-HDFS”目录(“dfs.domain.socket.path”)，该目录默认权限是750。而当前Linux用户没有权限操作该目录。上述问题可通过执行以下方法解决：方法一：创建新用户(推荐使用)。通过Manager页面创建新的用户，该用户属组中默认包含ficommon组。 [root@xxx-xxx-xxx-xxx ~]# id testuid=20038(test) gid=9998(ficommon) groups=9998(ficommon) 重新执行ImportData。方法二：修改当前用户的属组。将该用户添加到ficommon组中。 [root@xxx-xxx-xxx-xxx ~]# usermod -a -G ficommon test[root@xxx-xxx-xxx-xxx ~]# id testuid=2102(test) gid=2102(test) groups=2102(test),9998(ficommon) 重新执行ImportData。

MapReduce服务 MRS HBase故障排除