Umashankar created CASSANDRA-14934:
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             Summary: Cassandra Too many open files .
                 Key: CASSANDRA-14934
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14934
             Project: Cassandra
          Issue Type: Bug
          Components: Configuration
         Environment: This is in the Production environment .

We have observed 70k open files for the process in non-prd . 

 

Attached the entire logs of the open files . 
            Reporter: Umashankar
             Fix For: 3.10


We have 4 Node with 2 DC . 

We are seeing 

Caused by: java.nio.file.FileSystemException: 
/apps/cassandra/data/commitlog/CommitLog-6-1544453835569.log: Too many open 
files .

We have increased the ulimit to 24 k. 

lsof | grep <processid> 

.3.3 million records . 

 

Found ~ .2.5 millions of records are of TCP connection with either Socket 
connection status as ESTABLISHED/LISTEN . Found that connections are of 
datasource on 9042 . 

 

Thanks

 



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