datastax-startup

问题 I have 6 nodes, 1 Solr, 5 Spark nodes, using datastax. My cluster is on a similar server to Amazon EC2, with EBS volume. Each node has 3 EBS volumes, which compose a logical data disk using LVM. In my OPS center the same node frequently becomes unresponsive, which leads to a connect time out of my data system. My data amount is around 400GB with 3 replicas. I have 20 streaming jobs with batch interval every minute. Here is my error message: /var/log/cassandra/output.log:WARN 13:44:31,868 Not

问题 I have an old Cassandra cluster that I want to get rid of, and want to transfer data from only few selected tables from old cluster to a new one that I have created. I have tried using Cassandra's COPY command on a table that has about 15 million rows (approx 20 columns for each row). When I try to import data from the csv file to the same table in our new cluster, I am getting this response constantly : Failed to import 20 rows: WriteTimeout - Error from server: code=1100 [Coordinator node

问题 I upgraded OpsCenter from 6.0.3 to 6.0.5. Is there a way to migrate the LCM data? Is it as simple as copying the file lcm.db? Thanks. 回答1: OpsCenter developer here. 6.0.3 to 6.0.5 is a safe upgrade to do "in-place". So if it's a package you can just 'yum upgrade' or 'apt-get upgrade'. If you do want to backup/restore your settings for whatever reason, the best docs to look at are our high-availability docs (HA failover is basically a backup/restore): https://docs.datastax.com/en/opscenter/6.0

问题 One of our nodes in our 3 node cluster is down and on checking the log file, it shows the below messages INFO [keyspace.core Index WorkPool work thread-2] 2016-09-14 14:05:32,891 AbstractMetrics.java:114 - Cannot record QUEUE latency of 11 minutes because higher than 10 minutes. INFO [keyspace.core Index WorkPool work thread-2] 2016-09-14 14:05:33,233 AbstractMetrics.java:114 - Cannot record QUEUE latency of 10 minutes because higher than 10 minutes. WARN [keyspace.core Index WorkPool work

问题 we are using Datastax Enterprize edition. We are running a 2 node cluster. We get the message: After restarting of OpsCentre node getting below error. 2017-03-20 14:49:45,819 [opscenterd] ERROR: Unhandled error in Deferred: There are no clusters with name or ID 'tracking' File "/usr/share/opscenter/lib/py/twisted/internet/defer.py", line 1124, in _inlineCallbacks result = g.send(result) File "/usr/share/opscenter/jython/Lib/site-packages/opscenterd/WebServer.py", line 523, in

问题 I'm using DSE 5.1 (spark 2.0.2.6 and cassandra 3.10.0.1652) My Cassandra table: CREATE TABLE ks.tbl ( dk int, date date, ck int, val int, PRIMARY KEY (dk, date, ck) ) WITH CLUSTERING ORDER BY (date DESC, ck ASC); with the following data: dk | date | ck | val ----+------------+----+----- 1 | 2017-01-01 | 1 | 100 1 | 2017-01-01 | 2 | 200 My code must read this data and write the same thing but with yesterday's date (it compiles successfully): package com.datastax.spark.example import com

问题 I have set the following. rpc_address to external public ip. Listen Address : internal ip address (not the local host), rpc_broad_cast: internal ip address On Dev center, I am using external ip and port 9042. Let me know, if am doing anything wrong. 回答1: Thank you snakecharmerb for trying to help me out on this. I was able to find a solution for this myself. The actual problem was I was using Dev Center 1.4 to connect to Cassandra 3. Once I upgraded to the Dev Center 1.5, it worked like a

问题 I have created a new DataStax Enterprise Cluster that is managed using OpsCenter. All versions used are the latest available from the package repository. The agents have been installed and everything is working perfectly, including RAM Usage, CPU Load, etc. I have added over 90 GB to this cluster without a problem and the hosts can support a lot more.. It is clearly an OpsCenter / DataStax-Agent issue from what I can see. I do not see a relevant line in the log files of either OpsCenter or

问题 Currently, we are evaluating datastax enteprise as our provider of Cassandra and Spark.We consider deploying Datastax cluster on AWS. I have following questions: 1) In step 1 of Datastax on EC2 installation manual, I need to choose correct AMI Image: Currently there are 7 of them. Which is the correct one: (DataStax Auto-Clustering AMI 2.5.1-pv, DataStax Auto-Clustering AMI 2.6.3-1204-pv, DataStax Auto-Clustering AMI 2.6.3-1404-pv....) 2) The moment we launch the cluster, do we pay only for

问题 Please help me how I can stop Cassandra update automatically? At present when I install Cassandra through opscentre I get an error. Unable to restart DSE service. See /var/log/cassandra/system.log and /var/log/cassandra/output.log on the target node for details. system.log ERROR [main] 2018-03-28 07:58:26,123 CassandraDaemon.java:705 - Exception encountered during startup java.lang.AbstractMethodError: org.apache.cassandra.utils.JMXServerUtils$Exporter.exportObject(Ljava/rmi/Remote;ILjava/rmi