perfSONAR User Q&A and Other Discussion

[Jean-Michel Barbet <>]

On 09/19/2018 08:36 AM, Jean-Michel Barbet wrote:

> I tried to restart Cassandra and it looks OK :


I found that a java process was lingering after I stopped Cassandra.
I killed that process but there are errors in the Cassandra log
that suggests a DB corruption :

[root@nanperfs01 ~]# tail  /var/log/cassandra/cassandra.log
	at 
org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:643)
Caused by: org.apache.cassandra.io.compress.CorruptBlockException: 
(/var/lib/cassandra/data/system/local/system-local-jb-418-Data.db): 
corruption detected, chunk at 0 of length 143.
	at 
org.apache.cassandra.io.compress.CompressedRandomAccessReader.decompressChunk(CompressedRandomAccessReader.java:122)
	at 
org.apache.cassandra.io.compress.CompressedRandomAccessReader.reBuffer(CompressedRandomAccessReader.java:87)
        ... 22 more
Caused by: java.io.IOException: Compressed lengths mismatch
	at 
org.apache.cassandra.io.compress.LZ4Compressor.uncompress(LZ4Compressor.java:98)
	at 
org.apache.cassandra.io.compress.CompressedRandomAccessReader.decompressChunk(CompressedRandomAccessReader.java:118)
        ... 23 more
Exception encountered during startup: 
org.apache.cassandra.io.compress.CorruptBlockException: 
(/var/lib/cassandra/data/system/local/system-local-jb-418-Data.db): 
corruption detected, chunk at 0 of length 143.


I do not know how to recover from this... Maybe recreate the database?
Are there tools for this ?

Thanks

JM


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Jean-michel BARBET                    | Tel: +33 (0)2 51 85 84 86
Laboratoire SUBATECH Nantes France    | Fax: +33 (0)2 51 85 84 79
CNRS-IN2P3/IMT-Atlantique/Univ.Nantes | E-Mail: 

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