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Getting error for value exceeding max_value_size_in_mb in cassandra.yaml


By : Daniel Shen
Date : September 16 2020, 03:00 PM
To fix this issue Now I observed some errors on my Cassandra system.log/debug.log and node was sudden DOWN after below errors. ,
What does it mean by this value?
code :
Row [ Len: uint64_t, Data: char[Len] ]
Len must be < max_value_size_in_mb (256MB by default)


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Cassandra.yaml invalid error when adding seed_provider


By : kuboye wale
Date : March 29 2020, 07:55 AM
it fixes the issue The problem is your yaml configuration for seed_provider,
you are having the following configuration,
code :
# any class that implements the SeedProvider interface and has a
# constructor that takes a Map<String, String> of parameters will do.
seed_provider: "123.456.7.8"
    # 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: "172.0.0.1"
# any class that implements the SeedProvider interface and has a
# constructor that takes a Map<String, String> of parameters will do.
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: "123.456.7.8"

Yaml change not detected,Exception encountered during startup: Invalid yaml: file:/etc/cassandra/cassandra.yaml


By : John Michael Clement
Date : March 29 2020, 07:55 AM
wish help you to fix your issue It seems you have got into a issue with Cluster name,it is supposed be changed on all the nodes if you willing to change it.
Here are instruction to change Cluster name : 1. Log into cqlsh 2. cqlsh> UPDATE system.local SET cluster_name = 'Petter Cluster' where key='local'; (You need to issue this command on each of the nodes where you would like to change the cluster name. ) system.local gets changed only locally 3. cqlsh> exit; 4. $ nodetool flush system 5. edit cassandra.yaml cluster name to YOUR_CLUSTER_NAME. 6. Restart cassandra.

how to configure Cassandra.yaml which is inside docker image of cassandra at /etc/cassandra/cassandra.yaml


By : Arif Pahli
Date : March 29 2020, 07:55 AM
this will help Multiple ways to achieve this from host to container. You can simple use COPY or RUN in Dockerfile or with basic linux commands as sed, cat, etc. to place your configuration into the container. Another way you can pass environment variables while running your cassandra image which will pass those environment variables to the spawning container. Also, can use the docker volume mount it from host to container and you can map the configuration you want into the cassandra.yaml as shown below,
code :
$ docker container run -v ~/home/MyWorkspace/cassandra.yaml:/etc/cassandra/cassandra.yaml your_cassandra_image_name

Cassandra source code ConfigurationException expection URI in cassandra.config found cassandra.yaml


By : manikanta
Date : March 29 2020, 07:55 AM
it helps some times I was facing the same issue. Those variables ("cassandra.config", "cassandra.storagedir", etc...) are System variables.
You can either set them in your code by doing something like:

If I give row_cache_size_in_mb =5Gb in cassandra.yaml file, does cassandra reserves 5GB from Heap Memory?


By : Ryan McReady
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , It will let it grow to that size over time. Can use nodetool info to see the current size and limit and nodetool setcachecapacity to change it at runtime. Note that its kinda an estimate though and heap can grow a bit larger. I would be sure to test that the row_cache is actually improving things though since in a lot of cases having no row cache can be faster.
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