[ https://issues.apache.org/jira/browse/HDFS-6616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz Wo Nicholas Sze updated HDFS-6616: -------------------------------------- Status: Patch Available (was: Open) > bestNode shouldn't always return the first DataNode > --------------------------------------------------- > > Key: HDFS-6616 > URL: https://issues.apache.org/jira/browse/HDFS-6616 > Project: Hadoop HDFS > Issue Type: Bug > Components: webhdfs > Reporter: zhaoyunjiong > Assignee: zhaoyunjiong > Priority: Minor > Attachments: HDFS-6616.1.patch, HDFS-6616.patch > > > When we are doing distcp between clusters, job failed: > 014-06-30 20:56:28,430 INFO org.apache.hadoop.tools.DistCp: FAIL > part-r-00101.avro : java.net.NoRouteToHostException: No route to host > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at > sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1491) > at java.security.AccessController.doPrivileged(Native Method) > at > sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1485) > at > sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1139) > at > java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:379) > at org.apache.hadoop.hdfs.HftpFileSystem.open(HftpFileSystem.java:322) > at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:427) > at org.apache.hadoop.tools.DistCp$CopyFilesMapper.copy(DistCp.java:419) > at org.apache.hadoop.tools.DistCp$CopyFilesMapper.map(DistCp.java:547) > at org.apache.hadoop.tools.DistCp$CopyFilesMapper.map(DistCp.java:314) > at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50) > at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:429) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:365) > at org.apache.hadoop.mapred.Child$4.run(Child.java:255) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232) > at org.apache.hadoop.mapred.Child.main(Child.java:249) > The root reason is one of the DataNode can't access from outside, but inside > cluster, it's health. > In NamenodeWebHdfsMethods.java:bestNode, it always return the first DataNode, > so even after the distcp retries, it still failed. -- This message was sent by Atlassian JIRA (v6.2#6252)