I am running cassandra on Ec2 instance, while accessing cqlsh I am getting following error.
Pls suggest.
Click this to see the image of error log
Did you update kernel settings to increase number of threads/file handles? Error looks like you hit max threads system wide. https://docs.datastax.com/en/dse/5.1/dse-admin/datastax_enterprise/config/configRecommendedSettings.html has good recommendations.
Please check your python version. Since 2.2 , your python version should be greater than 2.6 for cqlsh to work.
Related
In the Ambari UI of the hortonworks sandbox, I was trying to open Hive View through the account of maria_dev. But however, I was getting the following error:
Service Hive check failed:
Cannot open a hive connection with connect string
jdbc:hive2://sandbox-hdp.hortonworks.com:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2;hive.server2.proxy.user=maria_dev
Can someone please help me sort out the error?
I was able to rectify the issue, although I was unable to understand why such a problem cropped up. I was using the hadoop ecosystem in a docker. I just stopped, removed and re-started the sandbox-hdp. After re-starting hive view was working just fine. But however, I am still getting the following error :
unable to load database password
If someone could clarify, it would be really great. :) :)
Hive reads some configurations from zookeeper and I was able to resolve the issue simply by restarting the Zoo keeper.
I have installed a DSX 3 node cluster on RHEL 7.4, all notebooks and r-studio code work fine. However, model creation gives this error:
Load Data
Error: The provided kernel id was not found. Verify the input spark service credentials
All kubernetes pods seem to be up and running. Any ideas on how to fix this?
If you are in the Sept release, suggest stop kernels and restart. There was a limit of of 10 kernels in that release. You will see the active green button across notebooks/models with option to stop.
I installed Datastax community version in an EC2 server and it worked fine. After that I tried to add one more server and I see two nodes in the Nodes menu but in the main dashboard I see the following error:
Error: Call to /Test_Cluster__No_AMI_Parameters/rc/dashboard_presets/ timed out.
One potential rootcause I can see is the name of the cluster? I specified something else in the cassandra.yaml but it looks like opscenter is still using the original name? Any help would be grealy appreciated.
It was because cluster name change wasn't made properly. I found it easier to change the cluster name before starting Cassandra cluster. On top of this, only one instance of opscentered needs to run in one single cluster. datastax-agent needs to be running in all nodes in the cluster but they need to point to the same opscenterd (change needs to be made at /var/lib/datastax-agent/conf/address.yaml)
I am using CDH 4 and setup Hue and Solr. I have also created collection in Solr which can be accessed from Solr UI. But I am unable to see this collection in Hue.
When I checked Hue log, I saw following error:
User [hue] not defined as proxyuser
I googled it, and found that it has something to do with some proxyuser setting in hue.ini. Even after doing changes suggested, I couldn't get it working.
Please help me in resolving this issue.
Regards,
If the error happens when using search, it is because Hue is not set as a proxy user as detailed in the documentation.
Seems like there was some problem with new version of Solr. I reverted back to default version of Solr shipped with CDH standard distribution and it started working.
I have been tasked to prepare a Sharded MongoDB Cluster on a windows environment. This is the first time I work with this product. I have been trying to get authentication on MongoDB 2.4 to work on this windows Sharded Cluster environment and it's not working. Once I enable the auth option on the 3 configuration servers, the MongoS instance is unable to start, when I remove the auth option, the MongoS instance works without any issues.
Can someone please shed some light on how to get authentication to work? The documentation mentions a "KeyFile" option but I've tried to use it in windows and the option is not recognized.
Thanks everyone.
Jaime Gonzalez
Note Key file permissions are not checked on Windows systems.
http://docs.mongodb.org/manual/tutorial/generate-key-file/