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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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TypeError: unsupported operand type(s) when the model is taken off queue

My intention is to create the cqlengine.models.Model instance in a separate process and send it via queue to the database manager. Unfortunatelly I am getting the TypeError if the multiprocessing queue is used The model from cassandra.cqlengine…
karelok
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cassandra.cqlengine.columns.UUID and Django {% url %} tag

I am running Django together with Cassandra DB. The cassandra.cqlengine.columns.UUID variable is translated by the url tag in Django template to the form of UUID('uuid_identifier'). The expression {% url 'myapp' uuid %} results in url like …
karelok
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Cassandra Light Weight Transaction in batch update affecting multiple partitions / tables

There is a scenario where I need to update multiple partitions (of the same or different table) together. Consider an example of the orders here: create table test.orders_by_id( order_email text, order_id timeuuid, order_name …
Piyush
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What guarantees are provided by DSE Graph transactions?

DSE Graph supports the Gremlin transaction API , and the docs have some information about transaction-specific options that can be set using the schema config API. The docs don't seem to have a lot of information yet on what a transaction "means",…
Leif Halldor Asgeirsson
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DSE Graph: traversals that use both secondary and search indexes, why do they hang?

It seems that gremlin traversals which use both secondary and search indexes in the same traversal hang. Why is that? My understanding from the DSE Graph docs on indexing is that the most appropriate index for low-cardinality properties is a…
Leif Halldor Asgeirsson
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While trying to load data using DSE graphloader I am getting the error - DSE Graph not configured to process queries

I am using the DSE Graphloader to load data from a CSV file to the DSE Graph. I did the following steps to load the data – Created the graph: system.graph('followTopic').create() Set the Alias: :remote config alias g followTopic.g Create the…
Virendra
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Meld error with Datastax Enterprise

Provisioning a DSE cluster with the lifecycle manager fails consitently. Master node (also the one OpsCenter is running on) installed correctly. Each one of the other nodes fails the install (also config) task. Have double-checked the SSH…
kostja
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Cassandra Nodes Going Down

I have a 3 node Cassandra cluster setup (replication set to 2) with Solr installed, each node having RHEL, 32 GB Ram, 1 TB HDD and DSE 4.8.3. There are lots of writes happening on my nodes and also my web application reads from my nodes. I have…
Hitesh
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DSE Authenticate Spark AlwaysOn SQL

I've installed DSE (Cassandra + Search + Graph + Analytics) on a single for dev purposes and I'm not able to connect to the AlwaysOn SQL, it's enabled on dse.yaml file but I'm not sure how to set access /…
Rafael Mor
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DSE Can't Install Graph From LCM

I've installed fresh version of DSE 6.8 for dev purposes, after installing a cluster with one node (Cassandra + Solr) I want to allow Graph, the job keeps failing with error: Graph is enabled and should have native-transport-address set to 0.0.0.0.…
Rafael Mor
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Will the gem -https://github.com/cequel/cequel (that itself uses https://github.com/datastax/ruby-driver) work with DSE 6.0?

Will the gem https://github.com/cequel/cequel (that itself uses https://github.com/datastax/ruby-driver)  work with DSE 6.0?
Mehdi
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Stop Cassandra update automatically

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…
Ranjeet Ranjan
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Removing node from Datastax Cluster

My current cluster contain 6 SearchGraph nodes and replication factor is 2. Datacenter: SearchGraph ======================= UN 192.168.8.1 469 MiB 1 ? 936a1ac0-6d5e-4a94-8953-d5b5a2016b92 rack1 UN 192.168.8.2 427.71 MiB 1 …
Sreeraju V
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How to enable Spark in Datastax Datacenter?

Our current Datastax datacenter setup contain 6 nodes in which both Solr and graph enabled root@ip-10-10-5-36:~# cat /etc/default/dse | grep -E 'SOLR_ENABLED|GRAPH_ENABLED' GRAPH_ENABLED=1 SOLR_ENABLED=1 root@ip-10-10-5-36:~# nodetool…
Sreeraju V
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DSE Cannot run program df - Too many open files

Our agent stoped working and the only way to get it back is by restarting the agent in every node, the error we get: ERROR [clojure-agent-send-off-pool-11618] df failed on execute; returning default value - Cannot run program "df": error=24, Too…
Rafael Mor
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