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Questions tagged [datastax-startup]

DataStax Enterprise is big data platform consisting of open source tools such as Apache Cassandra, Solr, Spark, Tinkerpop and more.

184 questions
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Transferring data from one cluster to another in Cassandra

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…
Ankush92
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dse-agents leaking filedescriptors and memory

Every time we backup our 3 nodes DSE cluster (5.1.2), Datastax agents (6.1.2) leak memory (~ 25MB) and filedescriptors (~ 1800). Since we make quite frequent backups, this is rather annoying. Is this a know issue or a normal behaviour (may be the FD…
leucos
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OpsCenter 6.1.2 keeps crashing after update from 6.0.X "No agents available to query for getDsePerformanceStatusFromOneAgent"

After updating OpsCenter 6.0.X to 6.1.2 using yum, OpsCenter frequently crashes with the following error in opsenterd.log: 2017-08-25 10:03:34,066 [opscenterd] ERROR: Unhandled error in Deferred: No agents available to query for…
Kilian
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Issue with writing to commit log file in cassandra

I m facing issue while starting cassandra . I am using Datastax version. When I start cassandra , it is closing with below issue. ERROR [main] 2017-08-10 20:42:04,999 CassandraDaemon.java:654 - Exception encountered during…
user2883028
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dse search apache uima integration

I have DSE 5.1, with solr 6.0.1, installed on CentOS 7.3.1611 (Core). And UIMA configured in eclipse for my annotator project. I am following the Solr documentation: https://wiki.apache.org/solr/Solr4UIMA The project created with UIMA has a simple…
JoaGacs
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Errors in opscenterd.log after starting repair service

After upgrading from Opscenter 5.x > 6.0.8 > 6.1.0 > 6.1.1, I see lots of errors and warnings in the opscenterd.log, like the following. I'm using DSE 4.8.10. I've turned on the Repair Service, which seems to be working as expected. But I see…
LHWizard
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Unable to start DSE Graph on reset Cassandra

I am testing DSE Graph (using DSE 5.0.7) a on a single node and managed to corrupt it completely. As a result I wiped out all the data files with the intention of rebuilding everything from scratch. On the first restart of Cassandra I forgot to…
PDH
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Dealing with eventual consistency in Cassandra

I have a 3 node cassandra cluster with RF=2. The read consistency level, call it CL, is set to 1. I understand that whenever CL=1,a read repair would happen when a read is performed against Cassandra, if it returns inconsistent data. I like the idea…
Ankush92
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DSE opscenter shows lapses in write requests for cluster when one node was down

We have a 2 node cassandra cluster and we stopped and restarted one of them. During this time interval, the graphs in opscenter showed something like this: We restarted the node with the orange line. I wonder why there's a break in this graph. I…
Ankush92
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OpsCenter not getting data after restart of server

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…
Ranjeet Ranjan
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Cassandra linux cannot connect from remote

I have installed cassandra but not able to connect to cassandra server from remote ip.. [root@li1632-39 ~]# cassandra -v 3.0.9 I and connecting public_ip:9042 but connection refused. When I try to validate by telnet I can see port is closed. When…
Ranjeet Ranjan
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Why does Spark 1.6.2 RPC Error message occur?

My script is written in python, it was working well on DSE 4.8 without docker environment. Now I upgraded to DSE 5.0.4 and run it in a docker environment and now I got the below RPC error. Before I used DSE Spark version 1.4.1 now I am using…
peter
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Is increasing `max_hint_window_in_ms` to days a bad idea?

I'm considering raising max_hint_window_in_ms to something like 72 hours. Anyone see issues with this? Essentially, it would allow us much longer downtime of nodes over a weekend without having to do a full repair.
Ztyx
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Airbnb Superset Datasource Configuration for SparkSQL

I am using Spark 1.6.2 (from the Datastax Enterprise Edition => DSE 5.0.4) and Python 2.7 When I give from impala.dbapi import connect Conn = connect (host = '172.31.12.201', port = 7077, user = 'xxxx', password = 'xxxx1111', database =…
Santhavathi Sivakumaran
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DSE Spark and RStudio Sparklyr integration

I'm trying to connect my RStudio Server to my DSE Analytics cluster. The setup: CentOS 7 openjdk-1.8 RStudio Server v1.0.136 (with latest version of sparklyr by >devtools::install_github("rstudio/sparklyr")) DSE 5.0 (spark 1.6.2) 5…
Mematematica
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