376905351_qq.com on "ERROR cfs.CassandraFileSystemRules: Loading path rules failed for: cfs UnavailableException()"

when i create table1 (STORED AS textfile) in hive ,
then i select from table1 into table2(STORED AS SEQUENCEFILE),
when the job complete 20%, the result become fail,
and then i use "dse hadoop fs -ls /" has problem ,and below
why and how can i restore？
3/07/22 16:23:01 ERROR cfs.CassandraFileSystemRules: Loading path rules failed for: cfs
UnavailableException()
at org.apache.cassandra.thrift.Cassandra$get_range_slices_result.read(Cassandra.java:12924)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at org.apache.cassandra.thrift.Cassandra$Client.recv_get_range_slices(Cassandra.java:734)
at org.apache.cassandra.thrift.Cassandra$Client.get_range_slices(Cassandra.java:718)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.datastax.bdp.util.CassandraProxyClient.invokeDseClient(CassandraProxyClient.java:640)
at com.datastax.bdp.util.CassandraProxyClient.invoke(CassandraProxyClient.java:616)
at $Proxy7.get_range_slices(Unknown Source)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystemRules.readRulesTable(CassandraFileSystemRules.java:131)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystemRules.loadRules(CassandraFileSystemRules.java:104)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystemRules.<init>(CassandraFileSystemRules.java:66)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystemThriftStore.initialize(CassandraFileSystemThriftStore.java:284)
at com.datastax.bdp.hadoop.cfs.CassandraFileSystem.initialize(CassandraFileSystem.java:73)
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.fs.FsShell.init(FsShell.java:82)
at org.apache.hadoop.fs.FsShell.run(FsShell.java:1745)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at org.apache.hadoop.fs.FsShell.main(FsShell.java:1895)
ls: could not get get listing for 'cfs://xxx.xx.xx.xx/' : java.lang.RuntimeException: UnavailableExceptio