datastax-enterprise

Our current setup contain DSE 5.0.2 version with 3 node cluster.Currently we are facing issue with heavy load and node failure issue.Debug.log details is given below: DEBUG [ReadRepairStage:8] 2016-09-27 14:11:58,781 ReadCallback.java:234 - Digest mismatch: org.apache.cassandra.service.DigestMismatchException: Mismatch for key DecoratedKey(5503649670304043860, 343233) (45cf191fb10d902dc052aa76f7f0b54d vs ffa7b4097e7fa05de794371092c51c68) at org.apache.cassandra.service.DigestResolver.resolve(DigestResolver.java:85) ~[cassandra-all-3.0.7.1159.jar:3.0.7.1159] at org.apache.cassandra.service

Using OpsCenter 5.1.0 and trying to add S3 as a location for snapshot backups. What are the necessary permissions in AWS IAM for the opscenter user? So far, I have the following policy: "Statement": [ { "Effect": "Allow", "Action": [ "s3:ListAllMyBuckets", "s3:GetBucketLocation" ], "Resource": "arn:aws:s3:::*" }, { "Effect": "Allow", "Action": [ "s3:ListBucket", "s3:GetBucketLocation" ], "Resource": [ "arn:aws:s3:::cassandra-bkup" ] }, { "Effect": "Allow", "Action": [ "s3:DeleteObject", "s3:GetObject", "s3:PutObject" ], "Resource": [ "arn:aws:s3:::cassandra-bkup/*" ] } ] but backups are still

When I try to start cassandra on ubuntu 12.04 (installed via Datastax's dsc20 package) as a service as follows : $ sudo service cassandra start it says *could not access pidfile for Cassandra & no other messages or anything in logs. But when I try to run as a root user( sudo cassandra -f ) it just works properly & cassandra is started. While trying to debug I found that when trying to run as a non-root user I was getting these messages: ERROR 17:48:08,432 Exception encountered during startup java.lang.AssertionError: Directory /var/lib/cassandra/data is not accessible. .. java.io

I would like to run Cassandra Datastax Enterprise on Amazon EC2 instances using not the node private IP address but Elastic Public IPs My current configuration looks as follows: /etc/dse/cassandra/cassandra.yaml seed_provider: - class_name: org.apache.cassandra.locator.SimpleSeedProvider parameters: seeds: "publicIP" listen_address: "publicIP" endpoint_snitch:Ec2Snitch rpc_address: "publicIP" The "dse" service is not starting properly. /var/log/cassandra/system.log is showing the following error: org.apache.cassandra.exceptions.ConfigurationException: Unable to bind to address /<publicIP>:7000

In the earlier beta releases of CQ L, there was a command I could use to set the read / write consistency of an individual CQL operation. It looked like this: SELECT * FROM users WHERE state='TX' USING CONSISTENCY QUORUM; I use CQL3 regularly and have a use-case where I need to be able to perform a read with a higher consistency level than the rest of our application. I looked through the CQL3 reference and didn't find any mention of any CQL syntax that allows me to change the consistency settings on a per-query basis, unless I'm using cqlsh (not useful for application development.) How am I

I have following method to write into cassandra some time it saving data fine. When I run it again , sometimes it is throwing NullPointerException Not sure what is going wrong here ... Can you please help me. ' @throws(classOf[IOException]) def writeDfToCassandra(o_model_family:DataFrame , keyspace:String, columnFamilyName: String) = { logger.info(s"writeDfToCassandra") o_model_family.write.format("org.apache.spark.sql.cassandra") .options(Map( "table" -> columnFamilyName, "keyspace" -> keyspace )) .mode(SaveMode.Append) .save() } ' 18/10/29 05:23:56 ERROR BMValsProcessor: java.lang