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Questions tagged [cassandra-2.1]

Casandra 2.1 is a NoSQL database sponsored by Apache. Use this tag for question specifically for version 2.1.

396 questions
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Map type read latency

First of all thanks to everyone here who answers all our queries. I am stucked in one of the points I hope people can get me out of my problem. I have Apache 2.1 Cluster with 6 nodes and I have created a table with 3 columns..1st column as text type…
john cena
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How to save data in cassandra conditionally only if properties did not change

We have data model of article with lot of properties. Here is our table model: CREATE TABLE articles ( organization_id bigint, gtin text, barcodes text, code text, brand text, season text, name text, option text, …
Nenad Bozic
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cassandra client received duplicated events

I'm using cassandra 2.1.2 and datastax cassandra-driver-core-2.1.2. Here is a strange problem: when a keyspace is created ( or table created, deleted), some of my clients received duplicated events, about 200+ times. my cluster and my clients are in…
高健峰
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Cassandra cluster key usage

I'm banging my head on this, but, frankly speaking, my brains won't get it - or so it seems. I have a column family that holds jobs for a rather large group of actors. It is a central job management and scheduling table that must be distributed and…
siliconchris
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Cassandra GC takes 30 seconds and hangs node

Environment I have a following environment: Cassandra 2.1.0 5 nodes in one DC, 4 nodes in second DC 2500 writes per seconds minimal reads (usually none, sometimes few) Problem After a long running node, GC starts to take longer and longer, until…
Piotr Stapp
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NoSuchMethodError: org.apache.cassandra.db.ColumnFamilyStore.getOverlappingSSTables

I have upgraded one of cluster node from 2.2.19 to 3.11.13, but I'm continuously getting the below error in system logs. I'm using TimeWindowCompactionStrategy-3.7.jar Please let me know how can I fix this error ? ERROR [CompactionExecutor:2338]…
Solver
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Hints during cassandra version upgrade from 2.1.17 to 3.0.15

I was trying to upgrade 4 nodes in a Cluster. DC1 had nodes N1 and N2 DC2 had nodes N3 and N4 App server is connected to N1 and N2 nodes. RF = {DC1: 2, DC: 2} DC2 nodes where upgraded to 3.0.15 first. There were inconsistency in data in DC2 as was…
Sahil Ummer
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Querying on cassandra consumes CPU

Connecting to Cassandra from application code and querying consumes Cassandra's CPU. My query is like :: select fields from table where partition_key = "PARTITION_KEY" and clustering_key_1 = "KEY1" and clustering_key_2 in (a1, a2, a3..a100); I am…
Shiva Prasad
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Cassandra read consistency is one, but node connects to another node

3 node cluster and RF of 3 means every node has all the data. Consistency is ONE. So when queried for some data on node-1, ideally as node-1 has all the data it should be able to complete my query. But when I checked how my query is running using…
Shiva Prasad
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Cassandra nodes are continuously throwing this error

I have 6 nodes Cassandra cluster where 3 are data nodes and 3 are seed nodes they all are using Cassandra version 3.7 below are the exceptions which I am getting on data nodes : java.lang.IllegalStateException: Unable to compute ceiling for max when…
Ankur Jha
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How write in cassandra works in terms of commitlog_segment_size_in_mb?

We caught the error "Mutation of 17156436 bytes is too large for the maximum size of 16777216" in Cassandra. I understand, we should increase the commitlog_segment_size_in_mb to 64 mb as mutation usually use 1/2 of commilog_segment_size and we were…
Mukesh Kumar
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How to configure Fluentd configuration file for sending logs to Kafka?

I've been working to create a syslog application in which I have to collect different kinds of logs generated using Fluentd and send them to Cassandra for analysis later on. I have to use Kafka as a kind of buffer or a stream processor. For using…
Sarthak Pundir
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How to Restore 2 DC cluster, 3 Node on each cluster to 1 DC and 3 node cluster

Please let me know how can we restore 2 DC cluster ( 3 node on each cluster ) to 1 DC cluster ( 3 node only). We also wants some specific keyspace to be restore on 1 DC cluster ( 3 node). Thanks in advance. Cheers, Mukesh kumar
Mukesh Kumar
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How to connect Cassandra over ssl using connection properties(url properties)

I have truststore and keystore files and every information related to the cassandra account. There is a limitation with the application that i use to connect to cassandra as it doesn't provide me the option to specify my truststore and keystore…
Nazer Syed
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In cassandra udf i am parsing date as saumya.text2dt('2019-01-16 13:10:44.000') and output is like 2019-10-16 07:30:00.000000+0000

My Cassandra User defined function:- CREATE OR REPLACE FUNCTION text2dt ( input text ) RETURNS NULL ON NULL INPUT RETURNS timestamp LANGUAGE java AS ' java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat("yyyy-MM-dd…
Saumya Ranjan
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