Hello, since last week when I try to query cosmos cluster with hive I'll get this error.

hive> select * from muv_tweet limit 10;
FAILED: RuntimeException org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.SafeModeException: Cannot create directory /tmp/hive-alessio.caiazza/hive_2015-10-12_12-59-27_269_6614332063661032399-1. Name node is in safe mode.
Resources are low on NN. Safe mode must be turned off manually.
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:2140)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:2114)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.mkdirs(NameNode.java:892)
    at sun.reflect.GeneratedMethodAccessor586.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$Server.call(RPC.java:557)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1439)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1435)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1278)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1433)

It sounds like a cluster problem and not something strictly related to my query.

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Yes I noticed. My question has been in moderation for about 10 days. Can I write an email directly to you if the same problem arise in the future?

nolith (Oct 21 '15)

Yes, this kind of service availability problems are better to be emailed rather than posted as a community question. Or if posted, an email is always useful for us, in order to react ASAP.

frb (Oct 21 '15)

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cosmos node is in safe mode, cannot execute query on hive

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