milleruntime opened a new issue #1886:
URL: https://github.com/apache/accumulo/issues/1886
Exception occurs during startup of a new cluster.
<pre>
2021-01-26T15:06:44,962 [fs.VolumeManagerImpl] DEBUG: exception getting EC
policy for hdfs://localhost:8020/accumulo/wal
java.io.FileNotFoundException: Path not found: /accumulo/wal
at
org.apache.hadoop.hdfs.server.namenode.FSDirErasureCodingOp.getErasureCodingPolicy(FSDirErasureCodingOp.java:371)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getErasureCodingPolicy(FSNamesystem.java:8170)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getErasureCodingPolicy(NameNodeRpcServer.java:2504)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getErasureCodingPolicy(ClientNamenodeProtocolServerSideTranslatorPB.java:1938)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine2.java:532)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1070)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1020)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:948)
at java.base/java.security.AccessController.doPrivileged(Native
Method)
at java.base/javax.security.auth.Subject.doAs(Subject.java:423)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1845)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2952)
at
jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
~[?:?]
at
jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
~[?:?]
at
jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
~[?:?]
at java.lang.reflect.Constructor.newInstance(Constructor.java:490)
~[?:?]
at
org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:121)
~[hadoop-client-api-3.3.0.jar:?]
at
org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:88)
~[hadoop-client-api-3.3.0.jar:?]
at
org.apache.hadoop.hdfs.DFSClient.getErasureCodingPolicy(DFSClient.java:3182)
~[hadoop-client-api-3.3.0.jar:?]
at
org.apache.hadoop.hdfs.DistributedFileSystem$67.doCall(DistributedFileSystem.java:3089)
~[hadoop-client-api-3.3.0.jar:?]
at
org.apache.hadoop.hdfs.DistributedFileSystem$67.doCall(DistributedFileSystem.java:3086)
~[hadoop-client-api-3.3.0.jar:?]
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
~[hadoop-client-api-3.3.0.jar:?]
at
org.apache.hadoop.hdfs.DistributedFileSystem.getErasureCodingPolicy(DistributedFileSystem.java:3103)
~[hadoop-client-api-3.3.0.jar:?]
at
org.apache.accumulo.server.fs.VolumeManagerImpl.canSyncAndFlush(VolumeManagerImpl.java:436)
~[accumulo-server-base-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.tserver.TabletServer.checkWalCanSync(TabletServer.java:979)
~[accumulo-tserver-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.tserver.TabletServer.<init>(TabletServer.java:255)
~[accumulo-tserver-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.tserver.TabletServer.main(TabletServer.java:232)
~[accumulo-tserver-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.tserver.TServerExecutable.execute(TServerExecutable.java:45)
~[accumulo-tserver-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.start.Main.lambda$execKeyword$0(Main.java:126)
~[accumulo-start-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: org.apache.hadoop.ipc.RemoteException: Path not found:
/accumulo/wal
at
org.apache.hadoop.hdfs.server.namenode.FSDirErasureCodingOp.getErasureCodingPolicy(FSDirErasureCodingOp.java:371)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getErasureCodingPolicy(FSNamesystem.java:8170)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getErasureCodingPolicy(NameNodeRpcServer.java:2504)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getErasureCodingPolicy(ClientNamenodeProtocolServerSideTranslatorPB.java:1938)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine2.java:532)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1070)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1020)
at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:948)
</pre>
It seems this only happens during the first time during startup of a new
cluster before the WAL directory is created yet. It may be easy to prevent
this error from being printed since its just noise on the debug log.
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