Cassandra: Nodetool showing "?" in Owns

nodetool cassandra
cassandra nodetool status
cassandra nodetool repair
nodetool version
nodetool tablestats
cassandra nodetool port
nodetool cleanup
nodetool cfstats

I wonder why nodetools don't know the percentage of the ring handeld by my node...

I created this keyspace with

CREATE KEYSPACE mykeyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'} AND durable_writes = true;

Someone has a clue?

okay got it. I have to specify a keyspace!

nodetool status mykeyspace

does the trick

Cassandra: Nodetool showing "?" in Owns, okay got it. I have to specify a keyspace! nodetool status mykeyspace. does the trick. Nodetool status on a node is showing all other nodes as down , where remaining all are up and healthy and at the same time nodetool status on the remaining nodes showing this particular node is down, where as it is healthy.

Do you get this at the bottom?

Note: Non-system keyspaces don't have the same replication settings, effective ownership information is meaningless

Do you have an opscenter / other keyspaces with different replication settings? In which case, ownership is "meaningless", and what you get is a ?

nodetool, Shows the failure detector information for the cluster. nodetool flush. Flushes one or more tables from the memtable. nodetool garbagecollect. Remove deleted  You can use nodetool tpstats to view the current outstanding requests on a particular node. This is useful for trying to find out which resource (read threads, write threads, compaction, request response threads) the Cassandra process lacks. For example:

These steps helped me. Kill the demon and restart Casansdra.

nodetool status ERROR>>

Note: Non-system keyspaces don't have the same replication settings, effective ownership information is meaningless

Kill cansandra demon. nodetool stopdemon systemctl status cassandra systemctl start cassandra nodetool status Good [root@ip-10-0-1-10 centos]# cqlsh localhost

nodetool, Shows the gossip information to discover broadcast protocol between nodes in a cluster. nodetool handoffwindow. Prints current hinted handoff window. Cassandra MultiNode cluster nodestatus showing only one node. Created a 3 node cluster by configuring below properties. When running nodetool -host hostip status command, it shows only one node. It is not showing all 3 nodes. I haven't setup any token and left to default.

Nodetool - Tutorial, utility provides commands for viewing detailed metrics for tables, server metrics, and compaction statistics. Commands include decommissioning a node, running repair, and moving partitioning tokens. The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data.

Validating Cassandra and ZooKeeper installation, for any node shows as DN , then that particular node is down. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. cassandra nodetool : Failed to connect to '127.0.0.1

Nodetool repair, - Flushes all memtables from a node to the SSTables that are on the disk. Scylla stops listening for connections from the client and other nodes. You need to restart Scylla after running this command. Most nodetool commands operate on a single node in the cluster if -h is not used to identify one or more other nodes. If the node from which you issue the command is the intended target, you do not need the -h option to identify the target; otherwise, for remote invocation, identify the target node, or nodes, using -h .

Comments
  • How many nodes do you have in your cluster? Is it just the one?
  • Yup...should've just said that :P
  • jep you are right...that's what it says! What is it trying to tell me?
  • Remember cassandra data is distributed across the nodes in the cluster. If all keyspaces have the same replication settings, then you can say node X own 25% of the data (or 30% or 10%...). However, if the replication settings across the keyspaces are different, there's no longer an "equal" distribution of data. A node may have data from one keyspace, or another with different replication parameters. As such, a figure like 25% doesn't mean anything - it might be coz replication's not working, or coz the node is "serving" little from a keyspace. Hence the message and the "?".