graph databases - Unable to start titan-server (Titan with Cassandra and Rexster) -


i trying implement titan graph database on cassandra 1 of applications. per documentation, have downloaded , extracted titan-cassandra-0.3.2 , when trying run titan.sh titan-server-rexster.xml andtitan-server-cassandra.properties arguments facing below error:

in below stack trace says "cannot locate /opt/isv/app/pkgs/titan-cassandra-0.3.2/config/cassandra.yaml" have file in location. could please help?

warn  org.apache.cassandra.utils.clibrary  - unable lock jvm memory (enomem). can result in part of jvm being swapped out, mmapped i/o enabled. increase rlimit_memlock or run cassandra root. 72   [pool-1-thread-1] error org.apache.cassandra.config.databasedescriptor  - fatal configuration error org.apache.cassandra.exceptions.configurationexception: cannot locate /opt/isv/app/pkgs/titan-cassandra-0.3.2/config/cassandra.yaml         @ org.apache.cassandra.config.databasedescriptor.getstorageconfigurl(databasedescriptor.java:113)         @ org.apache.cassandra.config.databasedescriptor.loadyaml(databasedescriptor.java:130)         @ org.apache.cassandra.config.databasedescriptor.<clinit>(databasedescriptor.java:122)         @ org.apache.cassandra.service.cassandradaemon.setup(cassandradaemon.java:150)         @ org.apache.cassandra.service.cassandradaemon.activate(cassandradaemon.java:366)         @ org.apache.cassandra.service.cassandradaemon.main(cassandradaemon.java:409)         @ com.thinkaurelius.titan.diskstorage.cassandra.embedded.cassandradaemonwrapper$cassandrastarter.run(cassandradaemonwrapper.java:64)         @ java.util.concurrent.executors$runnableadapter.call(executors.java:441)         @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:303)         @ java.util.concurrent.futuretask.run(futuretask.java:138)         @ java.util.concurrent.threadpoolexecutor$worker.runtask(threadpoolexecutor.java:886)         @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:908)         @ java.lang.thread.run(thread.java:619) cannot locate /opt/isv/app/pkgs/titan-cassandra-0.3.2/config/cassandra.yaml fatal configuration error; unable start server.  see log stacktrace.

a complete walkthrough enomem here

http://docs.datastax.com/en/archived/cassandra/2.0/cassandra/troubleshooting/trblshootinsufficientresources_r.html not forget

basically edit /etc/security/limits.conf file appending following

memlock unlimited nofile 100000 nproc 32768 unlimited

and run sysctl -p


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