datastax-java-driver

I'm running a two node Datastax AMI cluster on AWS. Yesterday, Cassandra started refusing connections from everything. The system logs showed nothing. After a lot of tinkering, I discovered that the commit logs had filled up all the disk space on the allotted mount and this seemed to be causing the connection refusal (deleted some of the commit logs, restarted and was able to connect). I'm on DataStax AMI 2.5.1 and Cassandra 2.1.7 If I decide to wipe and restart everything from scratch, how do I ensure that this does not happen again? You could try lowering the commitlog_total_space_in_mb

The exact Exception is as follows com.datastax.driver.core.exceptions.CodecNotFoundException: Codec not found for requested operation: [varchar <-> java.math.BigDecimal] These are the versions of Software I am using Spark 1.5 Datastax-cassandra 3.2.1 CDH 5.5.1 The code I am trying to execute is a Spark program using the java api and it basically reads data (csv's) from hdfs and loads it into cassandra tables . I am using the spark-cassandra-connector. I had a lot of issues regarding the google s guava library conflict initially which I was able to resolve by shading the guava library and

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

My Java code is as follows: import com.datastax.driver.core.Cluster; import com.datastax.driver.core.Metadata; import com.datastax.driver.core.Session; public class CustomerController { public void execute() { Cluster cluster = Cluster.builder() .addContactPoints("172.16.11.126", "172.16.11.130") .withPort(9042) .build(); Session session = cluster.connect(); String command = "drop keyspace if exists bookstore"; session.execute(command); cluster.close(); } } When I run the code, I get the following error: Exception in thread "main" com.datastax.driver.core.exceptions.NoHostAvailableException:

I am planning to use Datastax Java driver for writing to Cassandra.. I was mainly interested in Batch Writes and Asycnhronous features of Datastax java driver but I am not able to get any tutorials which can explain me how to incorporate these features in my below code which uses Datastax Java driver.. /** * Performs an upsert of the specified attributes for the specified id. */ public void upsertAttributes(final String userId, final Map<String, String> attributes, final String columnFamily) { try { // make a sql here using the above input parameters. String sql = sqlPart1.toString()+sqlPart2

I am trying to insert into my CQL table from the command line. I am able to insert everything. But I am wondering if I have a timestamp column, then how can I insert into timestamp column from the command line? Basically, I want to insert current timestamp whenever I am inserting into my CQL table - Currently, I am hardcoding the timestamp whenever I am inserting into my below CQL table - CREATE TABLE TEST (ID TEXT, NAME TEXT, VALUE TEXT, LAST_MODIFIED_DATE TIMESTAMP, PRIMARY KEY (ID)); INSERT INTO TEST (ID, NAME, VALUE, LAST_MODIFIED_DATE) VALUES ('1', 'elephant', 'SOME_VALUE', 1382655211694)