我在DSE 4.5中有5个节点集群正在运行并且正在运行。在5个节点中，1个节点是hadoop_enabled。但突然Hadoop节点停止工作。
日志：
INFO [JOB-TRACKER-INIT] 2014-08-19 08:18:44,196 CassandraFileSystem.java (line 68) CassandraFileSystem.uri : cfs://54.xx.xx.xx/
INFO [JOB-TRACKER-INIT] 2014-08-19 08:18:44,196 CassandraFileSystem.java (line 69) Default block size: 67108864
INFO [JOB-TRACKER-INIT] 2014-08-19 08:18:44,196 CassandraFileSystemThriftStore.java (line 309) Consistency level for reads from cfs: LOCAL_QUORUM
INFO [JOB-TRACKER-INIT] 2014-08-19 08:18:44,196 CassandraFileSystemThriftStore.java (line 310) Consistency level for writes into cfs: LOCAL_QUORUM
ERROR [JOB-TRACKER-INIT] 2014-08-19 08:18:44,197 UserGroupInformation.java (line 1124) PriviledgedActionException as:cassandra cause:java.io.IOException: UnavailableException()
INFO [JOB-TRACKER-INIT] 2014-08-19 08:18:44,197 JobTracker.java (line 2430) problem cleaning system directory: null
java.io.IOException: UnavailableException()
at com.datastax.bdp.hadoop.cfs.CassandraFileSystemThriftStore.mutateINode(CassandraFileSystemThriftStore.java:905)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystemThriftStore.storeINode(CassandraFileSystemThriftStore.java:827)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystem.mkdir(CassandraFileSystem.java:157)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystem.mkdirs(CassandraFileSystem.java:140)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystem.initialize(CassandraFileSystem.java:74)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1386)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:66)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1404)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:254)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:123)
at org.apache.hadoop.mapred.JobTracker$3.run(JobTracker.java:2373)
at org.apache.hadoop.mapred.JobTracker$3.run(JobTracker.java:2371)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:2371)
at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:2195)
at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:2189)
at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:303)
at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:294)
at com.datastax.bdp.hadoop.mapred.JobTrackerRunner.initService(JobTrackerRunner.java:84)
at com.datastax.bdp.hadoop.mapred.JobTrackerRunner.initService(JobTrackerRunner.java:31)
at com.datastax.bdp.hadoop.mapred.ServiceRunner.run(ServiceRunner.java:127)
at java.lang.Thread.run(Thread.java:744)
Caused by: UnavailableException()
at org.apache.cassandra.thrift.ThriftConversion.rethrow(ThriftConversion.java:57)
at org.apache.cassandra.thrift.CassandraServer.doInsert(CassandraServer.java:1079)
at org.apache.cassandra.thrift.CassandraServer.doInsert(CassandraServer.java:1061)
at org.apache.cassandra.thrift.CassandraServer.batch_mutate(CassandraServer.java:954)
at com.datastax.bdp.server.DseServer.batch_mutate(DseServer.java:576)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystemThriftStore.mutateINode(CassandraFileSystemThriftStore.java:897)
... 23 more
有人可以帮忙解决这个问题吗？我无法运行蜂巢。 感谢