Apache Cassandra: Unable to gossip with any seeds

问题

I have built Cassandra server 2.0.3, then run it. It is starting and then stopped with messages:

X:\MyProjects\cassandra\apache-cassandra-2.0.3-src\bin>cassandra.bat >log.txt
java.lang.RuntimeException: Unable to gossip with any seeds
        at org.apache.cassandra.gms.Gossiper.doShadowRound(Gossiper.java:1160)
        at org.apache.cassandra.service.StorageService.checkForEndpointCollision
(StorageService.java:416)
        at org.apache.cassandra.service.StorageService.joinTokenRing(StorageServ
ice.java:608)
        at org.apache.cassandra.service.StorageService.initServer(StorageService
.java:576)
        at org.apache.cassandra.service.StorageService.initServer(StorageService
.java:475)
        at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.ja
va:346)
        at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon
.java:461)
        at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.jav
a:504)

What I can change to run it?

回答1:

I had a similar problem with my cassandra v2.0.4 cluster running a single node.

Check your cassandra.yaml and make sure that your "listen_address" and "seeds" values match, with the exception that the seeds value requires quotes around it.

回答2:

You might get this problem if your private IP address is different than the public one (like on AWS). For example, the host thinks it's "172.31.0.2" when it's visible as "55.70.33.10".

The solution to this problem is:

listen_address: 172.31.0.2
broadcast_address: 55.70.33.10

回答3:

in cassandra.yaml

Make sure your cluster_name entry match on all the nodes in the cluster (you may need to delete your storage if you changed the cluster name)
Verify that all nodes can ping to each other
broadcast_rpc_address and listen_address should be set to local IP (not localhost or 127.0.0.1)
seeds should point to the IP address of the seed(s)

回答4:

If you are on AWS and use the Ec2MultiRegionSnitch you will need to set the seeds to the public IP addresses rather than the private IPs.

回答5:

I had the same problem on Ubuntu 16.04. I'm not sure which of these changes made it work, where XXX.XXX.XXX.XXX is your public facing IP address, below are selections from cassandra.yaml

seed_provider:
    # Addresses of hosts that are deemed contact points. 
    # Cassandra nodes use this list of hosts to find each other and learn
    # the topology of the ring.  You must change this if you are running
    # multiple nodes!
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          # seeds is actually a comma-delimited list of addresses.
          # Ex: "<ip1>,<ip2>,<ip3>"
          - seeds: "XXX.XXX.XXX.XXX"


listen_address: XXX.XXX.XXX.XXX
broadcast_address: XXX.XXX.XXX.XXX
broadcast_rpc_address: XXX.XXX.XXX.XXX
listen_on_broadcast_address: true
start_rpc: true
rpc_address: XXX.XXX.XXX.XXX

I also needed to restart my Virtual Machine for some reason. ¯_(ツ)_/¯

回答6:

For a quick single node setup on RHEL, I did the following: Get info about your network interface setup:

# /sbin/ifconfig -a

It will list the interfaces and the ip addresses they are attached to. Usually it will show an "Ethernet" interface and a "Local Loopback". Get the associated ip addresses.

Then edit conf/cassandra.yaml:

rpc_address: [Local Loopback address]
broadcast_rpc_address: [Ethernet address]
listen_address: [Local Loopback address]
broadcast_address: [Ethernet address]
listen_on_broadcast_address: true
seed_provider:
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          - seeds: "[Ethernet address]"

Then also, open the correct ports on Linux firewall, being 9042, 7000 and 7001. More info about opening ports on Linux here: http://ask.xmodulo.com/open-port-firewall-centos-rhel.html

回答7:

in cassandra.yaml, I update the seed from domain name to IP address. and it works.

回答8:

Happened to me because in my configuration the "intial_token" settings was specified (I think because I just copied to configuration file over from another cluster member). After clearing the data directory, commenting out the setting and restarting the node, it worked fine for me.

回答9:

I experienced this error today...

I could not find any reason for the error other than timing issues.

I restarted many times and after a while it sticked. It looks like they expect a bi-directional communication on the gossip channel and if it does not happen quickly enough (which looks like a very small amount of time to me) then they drop the line and generate that error.

In my case I just upgraded my software and restarted the computer. So it was clearly not a connection issue between the computers (I have firewalls and SSL, to complicate matters) and the node was connected before... So the one entry I found in that regard from datastax did not apply...

https://support.datastax.com/hc/en-us/articles/209691483-Bootstap-fails-with-Unable-to-gossip-with-any-seeds-yet-new-node-can-connect-to-seed-nodes

回答10:

I got the same error. There can be more than one solution. Hope my mistake is what you have done.

I had my localhost IP pointing to some domain name (and I did that in order that my Spring boot application's server context is some domain name like www.example.com:8080 instead of localhost:8080, and I had the following entry in my hosts file on Windows system).

127.0.0.1 www.example.com

While my cassandra batch file was looking for localhost which it didn't find. So, I made another entry for localhost too in my hosts file as:

127.0.0.1  localhost

127.0.0.1  www.example.com

After adding it, I opened new command prompt, ran cassandra batch from the cassandra bin directory and it then worked.

回答11:

Disable the firewall and SELINUX and try again

回答12:

In our case ssl was enabled, and cassandra.yaml configuration looks fine as per above comments. Then we enabled ssl debugging by by adding below jvm paramter in cassandra-env.sh -Djavax.net.debug=ssl:handshake

After starting the node again we noticed below in cassandra log file

MessagingService-Outgoing-geo2_host/xx.xx.xx.xx, Exception while waiting for close javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown

After further investigating the ssl debug logs we got to know that the certificate was not valid. After fixing this ssl issue node was able to join the cluster.

回答13:

Thanks to elvingt

His answer just remind me , I need to verify that all node needs to be able to talk to each other.
https://support.datastax.com/hc/en-us/articles/209691483-Bootstap-fails-with-Unable-to-gossip-with-any-seeds-yet-new-node-can-connect-to-seed-nodes

Gossip communications must be bi-directional.

To verify use this commnd, and you need test from BOTH SIDE

nc -vz {your_node_ip} 7000

Then I recollect that I turned on my ubuntu firewall last night. I open it by

sudo ufw allow 7000/tcp

And it is working now

回答14:

I had same issue, I checked port, used tcpdump, netcat to test connections and finally it comes to expired SSL certificates on internode_encryption. I modified internode_encryption to make it 'none', restarted all nodes and it worked. Before all neighbor nodes were down. And node repair command was failing with: "Did not get positive replies from all endpoints" P.S Dont leave internode_encryption as none for a long time, just regenerate certs and enable it back.

来源：https://stackoverflow.com/questions/20690987/apache-cassandra-unable-to-gossip-with-any-seeds

标签

cassandra-2.0