I'm trying to start a YARN NodeManager on my CDH 5.2.0 cluster using Cloudera Manager. All the other live nodes in the system started fine with the configuration in Cloudera Manager, but one node refuses to start, and throws this exception when started:
2015-01-09 04:12:17,619 ERROR org.apache.hadoop.yarn.server.nodemanager.NodeManager: Error starting NodeManager
java.lang.UnsupportedOperationException: Not implemented by the KosmosFileSystem FileSystem implementation
at org.apache.hadoop.fs.FileSystem.getScheme(FileSystem.java:216)
at org.apache.hadoop.fs.FileSystem.loadFileSystems(FileSystem.java:2564)
at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2574)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2591)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:91)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2630)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2612)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:370)
at org.apache.hadoop.fs.FileSystem.getLocal(FileSystem.java:341)
at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartRecoveryStore(NodeManager.java:140)
at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:190)
at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:445)
at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:492)
This doesn't make any sense to me at all: why would the thing be trying to initialize this unheard-of file system, let alone perform operations on it, when booting? It looks like this is during NodeManager recovery, (initAndStartRecoveryStore), so I tried deleting the yarn.nodemanager.recovery.dir on that node to see if it might make a difference, which it didn't.
Thanks for any help you can give me!
