I am trying to configure two windows servers in my network as Cassandra cluster.
I did some reading in various sites and changed the below in Cassandra.yalm
after changing the default value of 127.0.0.1 to actual IP the Cassandra service is not starting.
I also added the map to actual IP to localhost in (windows) hosts file.
After doing the above change, the service is coming up when I start the service. it is stopping immediately.
The reason I am changing this IP is to make this a cluster with two node setup,
Please let me know if I miss some thing.
Version: Datastax community version of Cassandra
Server : windows.
Thx
Muthu
Message from Cassandra.txt in logs dir:
ERROR [main] 2014-09-18 11:43:12,155 DatabaseDescriptor.java (line 116) Fatal configuration error
org.apache.cassandra.exceptions.ConfigurationException: Invalid yaml Caused by: Can't construct a java object for tag:yaml.org,2002:org.apache.cassandra.config.Config; exception=Cannot create property=seed_provider for JavaBean=org.apache.cassandra.config.Config#34e5190a; No suitable constructor with 2 arguments found for class org.apache.cassandra.config.SeedProviderDef in 'reader', line 8, column 1: cluster_name: 'Test Cluster'
If you want to create Cassandra cluster you must have at least two nodes and configure /etc/cassandra/cassandra.yaml
cassandra.yaml
cluster_name: 'Some Cluster Name'
listen_address: [Current IP]
rpc_address: [Current IP]
seed_provuder:
- seeds: "[Current IP], [Remote IP]"
Note: seeds must have at least two IPs which must be reachable for each other
Clean and start Cassandra instance
sudo rm -rf /var/lib/cassandra/* /var/log/cassandra/*
Note: Cassandra instance must be killed before cleaning those folders.
Related
cassandra service (3.11.5) stops automatically after it starts/restart on AWS linux.
I have fresh installation of cassandra on new instance of AWS linux (t3.xlarge) and
sudo service cassandra start
or
sudo service cassandra restart
after 1 or 2 seconds, the service stop automatically. I looked into logs and I found these.
I am not sure, I havent change configs related to snitch and its always SimpleSnitch. I dont have any multiple cassandras. Just only on single EC2.
Logs
INFO [main] 2020-02-12 17:40:50,833 ColumnFamilyStore.java:426 - Initializing system.schema_aggregates
INFO [main] 2020-02-12 17:40:50,836 ViewManager.java:137 - Not submitting build tasks for views in keyspace system as storage service is not initialized
INFO [main] 2020-02-12 17:40:51,094 ApproximateTime.java:44 - Scheduling approximate time-check task with a precision of 10 milliseconds
ERROR [main] 2020-02-12 17:40:51,137 CassandraDaemon.java:759 - Cannot start node if snitch's data center (datacenter1) differs from previous data center (dc1). Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true.
Installation steps
sudo curl -OL https://www.apache.org/dist/cassandra/redhat/311x/cassandra-3.11.5-1.noarch.rpm
sudo rpm -i cassandra-3.11.5-1.noarch.rpm
sudo pip install cassandra-driver
export CQLSH_NO_BUNDLED=true
sudo chkconfig --levels 3 cassandra on
The issue is in your log file:
ERROR [main] 2020-02-12 17:40:51,137 CassandraDaemon.java:759 - Cannot start node if snitch's data center (datacenter1) differs from previous data center (dc1). Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true.
It seems that you started the cluster, stopped it and renamed the datacenter from dc1 to datacenter1.
In order to fix:
If no data is stored, delete the data directories
If data is stored, rename the datacenter back to dc1 in the config
I had the same problem , where cassandra service immediately stops after it was started.
in the cassandra configuration file located at /etc/cassandra/cassandra.yaml change the cluster_name to the previous one, like this:
...
# The name of the cluster. This is mainly used to prevent machines in
# one logical cluster from joining another.
cluster_name: 'dc1'
# This defines the number of tokens randomly assigned to this node on the ring
# The more tokens, relative to other nodes, the larger the proportion of data
...
I am using ubuntu 14.04 with apache cassandra 3.7. I am trying to start it but get the following error message:
ERROR [main] 2016-07-15 15:22:10,627 CassandraDaemon.java:731 - Cannot start node if snitch's data center (dc1) differs from previous data center (datacenter1). Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true.
I know I can set -Dcassandra.ignore_dc=true, BUT that is not a fix, its a band-aid and for development use only, this is suppose to be in production. I tried to clear out all the files and folders in /var/lib/cassandra, I MEAN every SINGLE FILE AND FOLDER, started apache cassandra again, AND STILL THE SAME ERROR MESSAGE... any other idea??
change in file:
/etc/cassandra/cassandra-rackdc.properties
entry from dc1 to datacenter1
on all nodes
and then do a rolling restart of nodes.
If have just switched to GossipingPropertyFileSnitch, start Cassandra with the option
-Dcassandra.ignore_dc=true
If it starts successfully, execute:
nodetool repair
nodetool cleanup
Afterwards, Cassandra should be able to start normally without the ignore option.
I faced the issue while upgrading my Apache cassandra from 3.11.1 to 3.11.4 .
cassandra.yaml
old_Config : endpoint_snitch: GossipingPropertyFileSnitch
New_Config: endpoint_snitch: SimpleSnitch
{changed it to GossipingPropertyFileSnitch}
cassandra-rackdc.properties
old_version_config: dc:Dc1 rack:Rack1
New_version_config: dc:dc rack:rack (changed this to Dc1 and Rack1)
this resolves my issue
I'm using Spark Standalone Mode tutorial page to install Spark in Standalone mode.
1- I have started a master by:
./sbin/start-master.sh
2- I have started a worker by:
./bin/spark-class org.apache.spark.deploy.worker.Worker spark://ubuntu:7077
Note: spark://ubuntu:7077 is my master name, which I can see it in Master-WebUI.
Problem: By second command, a worker started successfully. But it couldn't associate with master. It tries repeatedly and then give this message:
15/02/08 11:30:04 WARN Remoting: Tried to associate with unreachable remote address [akka.tcp://sparkMaster#ubuntu:7077]. Address is now gated for 5000 ms, all messages to this address will be delivered to dead letters. Reason: Connection refused: ubuntu/127.0.1.1:7077
15/02/08 11:30:04 INFO RemoteActorRefProvider$RemoteDeadLetterActorRef: Message [org.apache.spark.deploy.DeployMessages$RegisterWorker] from Actor[akka://sparkWorker/user/Worker#-1296628173] to Actor[akka://sparkWorker/deadLetters] was not delivered. [20] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
15/02/08 11:31:15 ERROR Worker: All masters are unresponsive! Giving up.
What is the problem?
Thanks
I usually start from spark-env.sh template. And I set, properties that I need. For simple cluster you need:
SPARK_MASTER_IP
Then, create a file called "slaves" in the same directory as spark-env.sh and slaves ip's (one per line). Assure you reach all slaves through ssh.
Finally, copy this configuration in every machine of your cluster. Then start the entire cluster executing start-all.sh script and try spark-shell to check your configuration.
> sbin/start-all.sh
> bin/spark-shell
You can set export SPARK_LOCAL_IP="You-IP" #to set the IP address Spark binds to on this node in $SPARK_HOME/conf/spark-env.sh
In my case, using spark 2.4.7 in standalone mode, I've created a passwordless ssh key using ssh-keygen, but still got asked for worker password when starting the cluster.
What I did was follow the instructions here
https://www.cyberciti.biz/faq/how-to-set-up-ssh-keys-on-linux-unix/
This line solved the problem:
ssh-copy-id -i $HOME/.ssh/id_rsa.pub user#server-ip
I have a problem with a single node Cassandra installation.
I can start it without any errors in the log.
I can create a keyspace, create tables, insert and delete data.
However truncate is not working
cqlsh> CREATE KEYSPACE mykeyspace WITH REPLICATION = {'class' : 'SimpleStrategy', 'replication_factor': 1};
cqlsh> use mykeyspace;
cqlsh:mykeyspace> create table test1 (num int, primary key (num));
cqlsh:mykeyspace> insert into test1 (num) values (12);
cqlsh:mykeyspace> select * from test1;
num
-----
12
(1 rows)
cqlsh:mykeyspace> truncate test1;
Unable to complete request: one or more nodes were unavailable.
Also if I try to run nodetool describecluster it doesn't return complete response
[XXXX#XXXX dsc-cassandra-2.0.6]$ ./bin/nodetool describecluster
Cluster Information:
Name: Test Cluster
Snitch: org.apache.cassandra.locator.DynamicEndpointSnitch
Partitioner: org.apache.cassandra.dht.Murmur3Partitioner
Schema versions:
UNREACHABLE: [127.0.0.1]
I'm using
Cassandra DSC 2.0.6.
Red Hat 5.8.
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
I get responses for ping 127.0.0.1 and ping localhost
I checked all the ports that I am aware of cassandra may need (7000, 9160, 7199, 9042) using telnet - for example
telnet 127.0.0.1 7199
telnet localhost 7199
I can connect to these ports.
I'm using the default cassandra.yaml. These are the lines where either IP or hostname shows up
listen_address: localhost
rpc_address: localhost
seed_provider:
- class_name: org.apache.cassandra.locator.SimpleSeedProvider
parameters:
- seeds: "127.0.0.1"
I also looked into the source code. I believe the problem can be close to the method org.apache.cassandra.service.StorageProxyMBean.describeSchemaVersions(). Most likely I get no response to the SCHEMA_CHECK message.
I tried to enable TRACE log in log4j for nodetool (conf/log4j-tools.properties) to get more information about the issue, but somehow log4j didn't start logging (it did create the file that I set in the appender, but the file was empty.)
There must be something specific to this environment because I can't repeat this problem in any other environments. So I can't figure out what's causing it.
The problem was that Cassandra couldn't load snappy.
org.xerial.snappy.SnappyError: [FAILED_TO_LOAD_NATIVE_LIBRARY] null
at org.xerial.snappy.SnappyLoader.load(SnappyLoader.java:239)
at org.xerial.snappy.Snappy.<clinit>(Snappy.java:48)
at org.xerial.snappy.SnappyOutputStream.<init>(SnappyOutputStream.java:79)
at org.xerial.snappy.SnappyOutputStream.<init>(SnappyOutputStream.java:66)
at org.apache.cassandra.net.OutboundTcpConnection.connect(OutboundTcpConnection.java:359)
at org.apache.cassandra.net.OutboundTcpConnection.run(OutboundTcpConnection.java:150)
I turned off compression in cassanda.yaml
internode_compression: none
Now both nodetool describecluster and I truncate work.
I also found a similar post here Cassandra Startup Error 1.2.6 on Linux x86_64
Since I can't install another glibc on this machine for the sake of testing I downloaded snappy-java-1.0.4.1.jar and replaced libsnappyjava.so in my snappy-java-1.0.5.jar
With this jar I was able to run cassandra with
internode_compression: all
(I have glibc 2.5 installed)
I am newbie to Cassandra. I wanted to install cassandra-0.8.4 on 3 nodes and to run Map/Reduce job that uploads data from HDFS to Cassandra.
I have installed Cassnadra on 3 nodes lab02(199.168.0.2),lab03(199.168.0.3) & lab04(199.168.0.4) respectively and can create a keyspace & column family and they got distributed across the cluster.
When I run my map/reduce program it ended up with "UnknownHostException". the same map/reduce program works well on single node cluster.
Here are the steps which I have followed.
cassandra.yaml details
lab02(199.168.0.2): (seed node)
auto_bootstrap: false seeds: "199.168.0.2" listen_address: 199.168.0.2
rpc_address: 199.168.0.2
lab03(199.168.0.3): auto_bootstrap: true seeds: "199.168.0.2"
listen_address: 199.168.0.3 rpc_address: 199.168.0.3
lab04(199.168.0.4): auto_bootstrap: true seeds: "199.168.0.2"
listen_address: 199.168.0.4 rpc_address: 199.168.0.4
2.
When I run my map/reduce program it ended up with "UnknownHostException"
Error: java.net.UnknownHostException: /199.168.0.2 at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:849) at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1200) at java.net.InetAddress.getAllByName0(InetAddress.java:1153) at java.net.InetAddress.getAllByName(InetAddress.java:1083) at java.net.InetAddress.getAllByName(InetAddress.java:1019) at java.net.InetAddress.getByName(InetAddress.java:969) at org.apache.cassandra.client.RingCache.refreshEndpointMap(RingCache.java:93) at org.apache.cassandra.client.RingCache.(RingCache.java:67) at org.apache.cassandra.hadoop.ColumnFamilyRecordWriter.(ColumnFamilyRecordWriter.java:98) at org.apache.cassandra.hadoop.ColumnFamilyRecordWriter.(ColumnFamilyRecordWriter.java:92) at org.apache.cassandra.hadoop.ColumnFamilyOutputFormat.getRecordWriter(ColumnFamilyOutputFormat.java:132) at org.apache.cassandra.hadoop.ColumnFamilyOutputFormat.getRecordWriter(ColumnFamilyOutputFormat.java:62) at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:553) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408) at org.apache.hadoop.mapred.Child.main(Child.java:170)
Here are the config line for map/reduce.
job4.setReducerClass(TblUploadReducer.class );
job4.setOutputKeyClass(ByteBuffer.class);
job4.setOutputValueClass(List.class);
job4.setOutputFormatClass(ColumnFamilyOutputFormat.class);
ConfigHelper.setOutputColumnFamily(job4.getConfiguration(), args[1],args[3] );
ConfigHelper.setRpcPort(job4.getConfiguration(), args[7]); // 9160
ConfigHelper.setInitialAddress(job4.getConfiguration(), args[9]); // 199.168.0.2
ConfigHelper.setPartitioner(job4.getConfiguration(), "org.apache.cassandra.dht.RandomPartitioner");
Steps which I have verified are
There is a passwordless ssh has been configured b/w lab02,lab03
&lab04. All the nodes can ping each other with out any issues.
When I ran "InetAddress.getLocalHost()" from java program on lab02 it
prints "lab02/199.168.0.2".
When I over looked "o/p" of bin/cassandra it prints couple of
messages and under InetAddress field "/199.168.0.3" etc. Here it does
not print "hostname/IP". Is that problem?
Kindly help me to resolve above issue.
Regards,
Thamizhannal
This has been resolved already in 0.8 tip: https://issues.apache.org/jira/browse/CASSANDRA-3044
It's trying to look up the literal string "/199.168.0.2" as an address, which is indeed invalid. If this is coming from your configuration, remove the slash. Otherwise, it might be coming from RingCache which would be a bug. If so, first upgrade to 0.7.8 to make sure it's not already fixed. If the problem persists, open a bug on https://issues.apache.org/jira/browse/CASSANDRA.
Edit: Nate is right, this is a known bug in 0.8.4 that is fixed for 0.8.5.