Column family m does not exist in region

[vidya...@hotmail.com]

Hi,

We have a titan instance with HBase as the storage backend.

Titan version: 1.0.0

HBase/Hadoop version: Instantiated HBase compatibility layer supporting runtime HBase version 0.98.2-hadoop1 (from the logs)

Create Graph Instance logic

1. We create a .properties file with the following values:-

gremlin.graph=com.thinkaurelius.titan.core.TitanFactory

storage.backend=hbase

storage.hostname=<zk nodes>

storage.hbase.ext.zookeeper.znode.parent=/hbase-unsecure

schema.default=none

storage.hbase.table=<graphInstanceName>

2. Call TitanFactory.open(<our-properties-file-from-above) and 

3. Save the opened graph in global dictionary<graphName, graphInstance>

Cleanup Graph Instance logic

1. Delete properties file (corresponding to this graph instance)

2. Close  the global instance (g = map.getGraph(graphName); g.close())

3. Remove from our global dictionary, map.remove(graphName)

4. Use HBaseAdmin to  disableTable and deleteTable 

 

However we notice that sometimes we get the below error:-

Caused by: org.apache.hadoop.hbase.ipc.RemoteWithExtrasException: org.apache.hadoop.hbase.regionserver.NoSuchColumnFamilyException: Column family m does not exist in region 5B3BFBC370F04BA9BEFC63E9307906A4,,1485182910656.c0fbe7e1de0f1c85e5e3d3d10a6c367c. in table '5B3BFBC370F04BA9BEFC63E9307906A4', {NAME => 's', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'GZ', TTL => 'FOREVER', MIN_VERSIONS => '0', KEEP_DELETED_CELLS => 'false', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}

It seems  like we are ending up with a partial delete (because the HBase table has lot of more column families and only this one seems to be deleted). This results in a bunch of partial tables (as far as Titan is concerned) and our cleanup is not complete.

How can we make sure we are able to clean up our instance cleanly? 

Pointers are much appreciated !

Thanks!

    

[vidya...@hotmail.com]

Anyone is seeing similar issues? 

[Srinivas Rao]

I am also facing the same issue. Did you find any solution, Please let me know.  

[HadoopMarc]

Hi,

No idea whatś going on but my sysadmins use the hbck tool for such cases. Start with:

hbase hbck -details

Cheers,    Marc

Op woensdag 19 april 2017 13:12:58 UTC+2 schreef Srinivas Rao: