FunZONE-4-Geeks

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.makeR...

If you are trying to connect Mongo DB Server and it insanely throwing following error. com.mongodb.MongoTimeoutException : Timed out after 1000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=192.168.1.10:27010, type=UNKNOWN, state=CONNECTING, exception={ com.mongodb.MongoSecurityException: Exception authenticating MongoCredential {mechanism=null, userName='user123', source='admin', password=<hidden>, mechanismProperties={}}}, caused by {com.mongodb.MongoCommandException: Command failed with error 18 : 'Authentication failed.' on server 192.168.1.10:27010 . The full response is { "ok" : 0.0, "code" : 18, "errmsg" : "Authentication failed." }}}] If you start looking the error content First you encounter with Timeout Exception which may mislead you. It is basically an authentication error. I...

If you are trying to save a  whole simple java object into Aerospike database and your are getting the following annoying errors. com.aerospike.client.AerospikeException$Serialize: Error Code -1: java.io.NotSerializableException: com.sangnak-science. Person at com.aerospike.client.Value$BlobValue.estimateSize(Value.java:977) at com.aerospike.client.command.Command.estimateOperationSize(Command.java:767) at com.aerospike.client.command.Command.setWrite(Command.java:76) at com.aerospike.client.command.WriteCommand.writeBuffer(WriteCommand.java:56) at com.aerospike.client.command.SyncCommand.execute(SyncCommand.java:47) at com.aerospike.client.AerospikeClient.put(AerospikeClient.java:339) at com.yatra.Aerospike.main(Aerospike.java:57) Caused by: java.io.NotSerializableException: com.yatra.Person at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348) at com.aerospike.cli...