Help getting started on Cassandra development.

[Shariq]

Hi,

I am Shariq, and am a working at a open source, middleware company. We have
started using Cassandra since of late mainly to scale our cloud
infrastructure.
I am really impressed at what I have learnt so far, and would love to
contribute to this project. In fact we are contributing to numerous Apache
projects currently.

I have read through the getting started notes etc, and also gone through the
Jira list. I would be much grateful if you guys could point me to some Jiras
that would help
me enter and understand the codebase better. By submitting patches, I am
sure I would be able to gradually learn the entire code stack and contribute
fully to the project and earn commitership :).
Any tips and articles on getting started will be much welcome too.

Thanks in advance,
Shariq.

request for help/testing

[Eric Evans]

I banged http://caqel.deadcafe.org out as something we could point folks
to, something they could use to demo CQL without installing Cassandra.
Now I could use help with a couple of things.

1. Testing.  If you have the time/inclination, have a go at it and
report any bugs to http://github.com/eevans/caqel/issues.  Or better
yet, send me a pull request! :)

2. Design/styling.  It is butt-ugly; I suck at this.  If you can do
better (I suspect most of you can), please help.  I'll buy you a beer,
coffee, tea, lunch, or just give you a great big hug if that's what you
prefer.

Thanks!

-- 
Eric Evans
eev...@rackspace.com

json2sstable

[Steven Teo]

Hi,

I am trying to run json2sstable with the following command but am receiving the 
below error.
json2sstable -K testks -c testcf output.json 
/var/lib/cassandra/data/testks/testcf-f-1-Data.db 

Importing 321 keys...
java.lang.NullPointerException
at 
org.apache.cassandra.tools.SSTableImport.addColumnsToCF(SSTableImport.java:136)
at 
org.apache.cassandra.tools.SSTableImport.addToSuperCF(SSTableImport.java:173)
at 
org.apache.cassandra.tools.SSTableImport.importUnsorted(SSTableImport.java:228)
at 
org.apache.cassandra.tools.SSTableImport.importJson(SSTableImport.java:197)
at org.apache.cassandra.tools.SSTableImport.main(SSTableImport.java:421)
ERROR: null

anything i did wrongly here?

Thanks!

Build failed in Jenkins: Cassandra #850

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Started by an SCM change
Building remotely on ubuntu1
FATAL: cannot assign instance of hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
java.lang.ClassCastException: cannot assign instance of 
hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
at 
java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2056)
at 
java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1229)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1969)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:178)
at hudson.remoting.UserRequest.perform(UserRequest.java:98)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)

Build failed in Jenkins: Cassandra-0.7 #432

[Apache Hudson Server]

See 

--
Started by an SCM change
Building remotely on ubuntu1
FATAL: cannot assign instance of hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
java.lang.ClassCastException: cannot assign instance of 
hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
at 
java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2056)
at 
java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1229)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1969)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:178)
at hudson.remoting.UserRequest.perform(UserRequest.java:98)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)

Build failed in Jenkins: Cassandra-0.8 #4

[Apache Hudson Server]

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--
Started by an SCM change
Building remotely on ubuntu1
FATAL: cannot assign instance of hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
java.lang.ClassCastException: cannot assign instance of 
hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
at 
java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2056)
at 
java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1229)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1969)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:178)
at hudson.remoting.UserRequest.perform(UserRequest.java:98)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)

Build failed in Jenkins: Cassandra-0.8-Coverage #2

[Apache Hudson Server]

See 

--
Started by an SCM change
Building remotely on ubuntu1
FATAL: cannot assign instance of hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
java.lang.ClassCastException: cannot assign instance of 
hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
at 
java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2056)
at 
java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1229)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1969)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:178)
at hudson.remoting.UserRequest.perform(UserRequest.java:98)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)

Build failed in Jenkins: Cassandra-0.7-Coverage #25

[Apache Hudson Server]

See 

--
Started by an SCM change
Building remotely on ubuntu1
FATAL: cannot assign instance of hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
java.lang.ClassCastException: cannot assign instance of 
hudson.model.StreamBuildListener to field 
hudson.scm.subversion.WorkspaceUpdater$UpdateTask.listener of type 
hudson.model.TaskListener in instance of hudson.scm.SubversionSCM$CheckOutTask
at 
java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2056)
at 
java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1229)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1969)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at 
java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
at 
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:178)
at hudson.remoting.UserRequest.perform(UserRequest.java:98)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)