Failed to place enough replicas

小鱼儿 2022-06-16 03:55 200阅读 0赞

如果DataNode的dfs.datanode.data.dir全配置成SSD类型，则执行“hdfs dfs -put /etc/hosts hdfs:///tmp/”时会报如下错误：  
  
2017-05-04 16:08:22,545 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 3 to reach 3 (unavailableStorages=\[\], storagePolicy=BlockStoragePolicy\{HOT:7, storageTypes=\[DISK\], creationFallbacks=\[\], replicationFallbacks=\[ARCHIVE\]\}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy and org.apache.hadoop.net.NetworkTopology  
2017-05-04 16:08:22,545 WARN org.apache.hadoop.hdfs.protocol.BlockStoragePolicy: Failed to place enough replicas: expected size is 3 but only 0 storage types can be selected (replication=3, selected=\[\], unavailable=\[DISK\], removed=\[DISK, DISK, DISK\], policy=BlockStoragePolicy\{HOT:7, storageTypes=\[DISK\], creationFallbacks=\[\], replicationFallbacks=\[ARCHIVE\]\})  
2017-05-04 16:08:22,545 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 3 to reach 3 (unavailableStorages=\[DISK\], storagePolicy=BlockStoragePolicy\{HOT:7, storageTypes=\[DISK\], creationFallbacks=\[\], replicationFallbacks=\[ARCHIVE\]\}, newBlock=true) All required storage types are unavailable:  unavailableStorages=\[DISK\], storagePolicy=BlockStoragePolicy\{HOT:7, storageTypes=\[DISK\], creationFallbacks=\[\], replicationFallbacks=\[ARCHIVE\]\}  
2017-05-04 16:08:22,545 INFO org.apache.hadoop.ipc.Server: IPC Server handler 37 on 8020, call Call\#5 Retry\#0 org.apache.hadoop.hdfs.protocol.ClientProtocol.addBlock from 10.208.5.220:40701  
java.io.IOException: File /tmp/in/hosts.\_COPYING\_ could only be replicated to 0 nodes instead of minReplication (=1).  There are 5 datanode(s) running and no node(s) are excluded in this operation.  
        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1733)  
        at org.apache.hadoop.hdfs.server.namenode.FSDirWriteFileOp.chooseTargetForNewBlock(FSDirWriteFileOp.java:265)  
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2496)  
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:828)  
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:506)  
        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)  
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:447)  
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:989)  
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:845)  
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:788)  
        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:1807)  
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2455)