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Hadoop >> mail # user >> Cannot renew lease for DFSClient_977492582. Name node is in safe mode in AWS


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Cannot renew lease for DFSClient_977492582. Name node is in safe mode in AWS
When I run client to create files in amazon HDFS I get this error. Does
anyone know what it really means and how to resolve this?

---
2012-03-14 23:16:21,414 INFO org.apache.hadoop.ipc.Server (IPC Server
handler 46 on 9000): IPC Server handler 46 on 9000, call
renewLease(DFSClient_977492582) from 10.70.150.119:47240: error:
org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot renew
lease for DFSClient_977492582. Name node is in safe mode.

The ratio of reported blocks 1.0000 has reached the threshold 0.9990. Safe
mode will be turned off automatically in 0 seconds.

org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot renew
lease for DFSClient_977492582. Name node is in safe mode.

The ratio of reported blocks 1.0000 has reached the threshold 0.9990. Safe
mode will be turned off automatically in 0 seconds.

at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.renewLease(FSNamesystem.java:2296)

at
org.apache.hadoop.hdfs.server.namenode.NameNode.renewLease(NameNode.java:814)

at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)

at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)

at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)

at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)

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:1059)

at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB