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Questions tagged [nodetool]

Command line tool for managing Cassandra clusters.

nodetool is a command that allows you to interact with a Cassandra cluster to manage it. You can use it to see the current status of nodes in the cluster, repair nodes, decommission nodes, and perform other maintenance tasks.

http://wiki.apache.org/cassandra/NodeTool

229 questions
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nodetool repair across replicas of data center

Just want to understand the performance of 'nodetool repair' in a multi data center setup with Cassandra 2. We are planning to have keyspaces with 2-4 replicas in each data center. We may have several tens of data centers. Writes are done with…
vishr
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Cassandra nodetool repair freezes entire cluster

Need help understanding what's happening to Cassandra when attempting a nodetool repair on one of the column families in our keyspace. We are running Cassandra 2.0.7 and have a table we use for indexing object data in our system. CREATE TABLE…
Brent Haines
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Cassandra hanging after 80 Million rows were inserted

Cassandra installation with default configs. Just a single node server, 48GB ram, 2 TB hdd. About 80 millions of rows were inserted when it slowed down significantly. New connections are refused with timeout error. Opssenter throws timeouts as…
Spaceman
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How nodetool garbagecollect will remove the shadowed tombstone data from the sstables

I have gone through nodetool garbagecollect documentation, it is not mentioned how this command removes shadowed tombstone data from multiple and overlapping sstables.
Rohit Thakur
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Is Cassandra 4.1 not compatible with Ubuntu 20.04?

I can't make connection into my nodecluster, my nodetool status is currenty refused, i am using Cassandra 4.1 but not working trying edit in cassandra.yaml for localhost using 127.0.0.1 also edit my cassandra-env.sh for public name rename it with…
BlossomX
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Some Cassandra nodes show DN - gossip information is not unanimous

I have a 16-node Cassandra cluster (3.11.9) with 3 seed nodes (.54, .115 and 164), replication factor 3 and gc_grace_seconds 10 days(default). Some nodes show DN on some other nodes but on other nodes they show up as UN. For example below is the…
Des0lat0r
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High disk I/O (read) on Cassandra nodes

We have 3 nodes Cassandra cluster. We have an application that uses a keyspace that creates a hightload on disks, on read. The problem has a cumulative effect. The more days we interact with the keyspace, the more disk reading grows. : hightload…
Nick
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CounterMutationStage and ViewMutationStage metrics are missing in Cassandra 4.0

When invoking nodetool tpstats on Cassandra 4.0, here is what I got nodetool result screenshot But no CounterMutationStage and ViewMutationStage found. Where are they?
Stephen Ma
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Compaction total time in Cassandra

Is there any way to find exact timing taken by a compaction for particular table or when compaction starts or ends in Cassandra using nodetool or opscenter. Couldn't find any.
exploding_data
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How to remove the cassandra node from failuredetector

I used the nodetool decommission command to remove a node from the cassandra cluster. Then I used the nodetool status command to see that the node was successfully removed, but using the nodetool failuredetector command, I can see that the removed…
Leaf Rotten
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Restart Cassandra Decommission after it failed

I have a Cassandra cluster and am in process of replacing a few nodes. I have added three new nodes to the cluster, and then I started the decommissioning process. The decommission failed after streaming some data, and I see the following errors in…
Neeraj Gangwar
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Hardware maintenance activity on One of the Cassandra Node

Need help, I have a 4 node cassandra Cluster, RF 2 and There is a Hardware maintenance activity (Total Activity time can be 30-40 mins) scheduled on one of the node . Please let me know how we can safely do this activity without impacting the live…
Dinesh Choubey
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Is there any solution for "nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'"?

In my cassandra cluster , all nodes are available. But for one node, when I check the status it is showing like: "nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'." As I've seen some…
user14761138
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Nodetool describecluster list all nodes unreachable

I am deploying cassandra on two public networks, when nodes are started i can see all the node has joined the ring. Also nodetool describecluster shows all nodes are reachable. After sometime i see nodes are not able to connect to each other and…
Vishal Sourav
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Cassandra Node refuses to Join Cluster "Compaction Executor" error

We have a 3 node Cassandra Cluster running the following version [cqlsh 5.0.1 | Cassandra 3.11.6 | CQL spec 3.4.4 | Native protocol v4] Node1 stopped communicating with the rest of the cluster this morning, the logs showed this: ERROR…
Duncan Abrahams
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