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java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager

If you are trying to get started with Janus Graph with Apache Cassandra. You may get the following error.


Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Temporary failure in storage backend
at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:219) ~[janusgraph-cassandra-0.2.0.jar:na]
at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.<init>(CassandraThriftStoreManager.java:198) ~[janusgraph-cassandra-0.2.0.jar:na]
... 48 common frames omitted
Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused (Connection refused)
at org.apache.thrift.transport.TSocket.open(TSocket.java:187) ~[libthrift-0.9.2.jar:0.9.2]
at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81) ~[libthrift-0.9.2.jar:0.9.2]
at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeRawConnection(CTConnectionFactory.java:110) ~[janusgraph-cassandra-0.2.0.jar:na]
at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:74) ~[janusgraph-cassandra-0.2.0.jar:na]
at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:43) ~[janusgraph-cassandra-0.2.0.jar:na]
at org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1220) ~[commons-pool-1.6.jar:1.6]
at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:216) ~[janusgraph-cassandra-0.2.0.jar:na]
... 49 common frames omitted
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_131]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_131]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_131]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_131]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_131]
at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_131]
at org.apache.thrift.transport.TSocket.open(TSocket.java:182) ~[libthrift-0.9.2.jar:0.9.2]
... 55 common frames omitted

If you read the exception carefully, You will get to know that there is some connection problem with Apache Cassandra.

Janus Graph implementation by default uses cassandrathrift  for the interaction and by default the thrift port is not enabled  in Apache Cassandra. So All you need to enable it and restart the Apache Cassandra.

You can enable it in the cassandra.yaml file. Modify the below property

start_rpc: true

Happy Programming :)

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Comments

  1. Bolt8 July 2018 at 03:29

    Hi

    I am facing the same execption, but unable to resolve it.

    The start_rpc property is already set to true in /conf/cassandra/cassandra.yaml file.

    Are there any other precursor steps to followed, perhaps to start/restart cassandra? If so how?

    I am trying the get started lab on an aws ec2 ubuntu instance.

    Thanks and hope you have some pointers.

    ReplyDelete
    Replies
    1. Shubham20 July 2018 at 04:27

      Kill your cassandra process and restart it. Your application and cassandra are in same data centre?

      Delete

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