CODEWITHSUNDEEP
cassandracassandra-2.0
henry
henry

Reputation: 607

Cassandra error: No nodes present in the cluster

I am just trying to learn Cassnadra, I am doing simple exercise of setting two node cluster, but have difficulties - it neve worked so far. Cassandra Version: 2.1.1.

Host OS: Centos 6.5 64-bit

Java: 8 (Oracle)

Number of Nodes: 2

Node addresses: 192.168.0.41 and 192.168.0.43 (Static)

Ports open on firewalls on both boxes: 7000, 9042, 9160, 7199

I did the following to setup cluster:

Changed cluster_name on both boxes to "MyCluster", both in cassandra.yaml and in tables as described here:

cassandra - Saved cluster name Test Cluster != configured name

Changed listen_address to 192.168.0.41 and 192.168.0.43 respectivelly.

Changed rpc_address to 192.168.0.41 and 192.168.0.43 respectivelly.

On 41 I set "seeds: 192.168.0.43"

On 43 I set "seeds: 192.168.0.43" (same as on 41)

Each node works by itself (when the other is down), it starts and responds to 

nodetool status

just fine and keep running, I can also connect with cqlsh and run 

describe keyspaces;

That works too. But when I run both nodes simultaneously one of them dies after a minute or two.

The exact symptoms are: the node still responds to cqlsh command describe keyspaces fine, so it is kind of alive, But when trying to do nodetool status following error is printed on nodetool output:

error: No nodes present in the cluster. Has this node finished starting up?
-- StackTrace --
java.lang.RuntimeException: No nodes present in the cluster. Has this node finished starting up?
    at org.apache.cassandra.dht.Murmur3Partitioner.describeOwnership  
         (Murmur3Partitioner.java:130)
         ....

The other node continues to run fine and it keeps reporting 100% ownership by itself as the only node in cluster.

Here is system.log portion of 43 around time it "died":

WARN  [GossipStage:1] 2014-11-17 04:33:30,163 TokenMetadata.java:198 - Token -7592767110844961279 changing ownership from /192.168.0.43 to /192.168.0.41
WARN  [GossipStage:1] 2014-11-17 04:33:30,163 TokenMetadata.java:198 - Token -7240492143116021720 changing ownership from /192.168.0.43 to /192.168.0.41
WARN  [GossipStage:1] 2014-11-17 04:33:30,163 TokenMetadata.java:198 - Token -8434936427655644773 changing ownership from /192.168.0.43 to /192.168.0.41
WARN  [GossipStage:1] 2014-11-17 04:33:30,163 TokenMetadata.java:198 - Token -1656745619022636889 changing ownership from /192.168.0.43 to /192.168.0.41
WARN  [GossipStage:1] 2014-11-17 04:33:30,163 TokenMetadata.java:198 - Token -7470625165291146007 changing ownership from /192.168.0.43 to /192.168.0.41
INFO  [HANDSHAKE-/192.168.0.41] 2014-11-17 04:33:30,230 OutboundTcpConnection.java:427 - Handshaking version with /192.168.0.41
INFO  [GossipTasks:1] 2014-11-17 04:33:49,179 Gossiper.java:906 - InetAddress /192.168.0.41 is now DOWN
INFO  [HANDSHAKE-/192.168.0.41] 2014-11-17 04:33:50,190 OutboundTcpConnection.java:427 - Handshaking version with /192.168.0.41
INFO  [SharedPool-Worker-1] 2014-11-17 04:34:30,224 Gossiper.java:892 - InetAddress /192.168.0.41 is now UP
INFO  [CompactionExecutor:5] 2014-11-17 04:41:01,178 CompactionManager.java:521 - No files to compact for user defined compaction
INFO  [CompactionExecutor:6] 2014-11-17 04:51:01,187 CompactionManager.java:521 - No files to compact for user defined compaction

Any idea what could be wrong? Thank you

Upvotes: 4

Views: 7747

Answers (5)

Bharath Kumar
Bharath Kumar

Reputation: 1

It is because of metadata about the cluster still exists. So clear the files of local and peer under the default directory : metadata_directory: /var/lib/cassandra/metadata OR The path of metadata directory mentioned in the cassandra.yaml. And then start the cassandra service.

Upvotes: 0

Jobin
Jobin

Reputation: 6992

Refer: How do you fix node token collision issues when starting up Cassandra nodes in a cluster on VMWare?

"Make sure to delete the Location Info directories, which contain the data about the cluster"

I deleted the following folders then it works fine

  1. /home/db/cassandra/apache-cassandra-2.1.2/data/data
  2. /home/db/cassandra/apache-cassandra-2.1.2/data/commitlog
  3. /home/db/cassandra/apache-cassandra-2.1.2/data/saved_caches

Upvotes: 6

Flickerlight
Flickerlight

Reputation: 984

I'm also new to Cassandra, and I met exactly the same error as you described above, too.

My environment:

Host OS: Centos 6.5 64-bit

Cassandra: 2.1.2, raw binary package (not rpm installed)

Java 7 (Oracle)

Firewall closed

two nodes in the same LAN

I've also tried many times but this problem just cannot be solved. Finally, I decided to delete both the current Cassandra binaries and begin from a total new extracted package.

Surprisingly, this works.

I then re-do all my configurations and start Cassandra, no problem happens this time. Both nodes are started and the cluster is formed successfully.

I know this can hardly be called as a "solution" to this problem, but I just want to share my experience here. I'm wondering maybe some cached information caused this problem?

Upvotes: 0

G Quintana
G Quintana

Reputation: 4667

I am not sure a reccursive seed is a good thing. Try removing seed on 43 "I set "seeds: 192.168.0.43"".

Upvotes: 1

Rocherlee
Rocherlee

Reputation: 2801

It seems your config is correct. Let's try the following:

Start 43 first (the seed node)

After 43 finishes starting up, start 41.

Upvotes: 0

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