[HDFS-14422] RBF: Router shouldn't allow READ operations in safe mode

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0, HDFS-13891
• Hadoop Flags: Reviewed
• Assignee: Íñigo Goiri
• Reporter: Íñigo Goiri
• Created: 11/Apr/19 18:25
• Updated: 12/Sep/19 20:03
• Resolved: 16/Apr/19 14:24

Description

We are currently seeing:

org.apache.hadoop.hdfs.server.federation.store.StateStoreUnavailableException: Mount Table not initialized
at org.apache.hadoop.hdfs.server.federation.resolver.MountTableResolver.verifyMountTable(MountTableResolver.java:521)
at org.apache.hadoop.hdfs.server.federation.resolver.MountTableResolver.getDestinationForPath(MountTableResolver.java:394)
at org.apache.hadoop.hdfs.server.federation.resolver.MultipleDestinationMountTableResolver.getDestinationForPath(MultipleDestinationMountTableResolver.java:87)
at org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.getLocationsForPath(RouterRpcServer.java:1258)
at org.apache.hadoop.hdfs.server.federation.router.RouterClientProtocol.getFileInfo(RouterClientProtocol.java:747)
at org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.getFileInfo(RouterRpcServer.java:749)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileInfo(ClientNamenodeProtocolServerSideTranslatorPB.java:881)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:513)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1011)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:871)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:817)
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:1915)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2621)

The Namenode allows READ operations but for the Router not being able to access the State Store also hits the read operations.