You may be using the async feature
http://www.datastax.com/documentation/developer/java-driver/1.0/java-driver/asynchronous_t.html
of the java driver. In order to manage complexity related to do several
queries I used RxJava, it leverages readability and asynchronicity in a
very elegant way (much
Hi All,
Just come across this one, I’m at a bit of a loss on how to fix it.
A user here did the following steps
On a MAC
Install Datastax Enterprise (DSE) using the dmg file
test he can connect using the DSE cqlsh window
Unistall DSE (full uninstall which stops the services)
download apache
Please run jps to check which Java services are still running and to make sure
if c* is running. Then please check if 9160 port is in use. netstat -nltp |
grep 9160
This will confirm what is happening in your case.
Sent from my iPhone
On 29-Sep-2014, at 7:15 pm, Andrew Cobley
Without the apache cassandra running I ran jps -l on this machine ,the only
result was
338 sun.tool.jps.Jps
The Mac didn’t like the netstat command so I ran
netstat -atp tcp | grep 9160
no result
Also for the native port:
netstat-atp tcp | grep 9042
gave no result (command may be wrong)
Hi All,
We're running 2 cassandra 2.1 clusters (development and production) and
whenever I run a nodetool repair on indexed tables I get an java exception
about creating snapshots:
Command line:
[2014-09-29 11:25:24,945] Repair session
73c0d390-47e4-11e4-ba0f-c7788dc924ec for range
On Mon, Sep 29, 2014 at 8:35 AM, Jeronimo de A. Barros
jeronimo.bar...@gmail.com wrote:
We're running 2 cassandra 2.1 clusters (development and production) and
whenever I run a nodetool repair on indexed tables I get an java exception
about creating snapshots:
Don't run 2.1 in production
On Fri, Sep 26, 2014 at 9:52 AM, Gene Robichaux gene.robich...@match.com
wrote:
I am fairly new to Cassandra. We have a 9 node cluster, 5 in one DC and
4 in another.
Running a repair on a large column family seems to be moving much slower
than I expect.
Unfortunately, as others have
On Fri, Sep 26, 2014 at 9:08 PM, Kevin Burton bur...@spinn3r.com wrote:
I have the requirements to periodically run full tables scans on our
data. It’s mostly for repair tasks or making bulk UPDATEs… but I’d prefer
to do it in Java because I need something mildly trivial.
I have run a sysbench file io test on my home PC and office PC. The result is
given below. The result shows my office PC (with a SSD) is about 3 times more
performant than my home PC (with a sata hard disk).
Home PC :
gauss:~ sysbench --test=fileio --file-total-size=50G prepare
sysbench 0.5:
What is the recommendation on the number of tokens value? I am asking because
of the issue with sequential repairs on token range after token range.
Rahul Neelakantan
On Sep 29, 2014, at 2:29 PM, Robert Coli rc...@eventbrite.com wrote:
On Fri, Sep 26, 2014 at 9:52 AM, Gene Robichaux
On Mon, Sep 29, 2014 at 2:29 PM, Robert Coli rc...@eventbrite.com wrote:
As an aside, you just lose with vnodes and clusters of the size. I
presume you plan to grow over appx 9 nodes per DC, in which case you
probably do want vnodes enabled.
I typically only see discussion on vnodes vs.
Hi again,
On Mon, Sep 29, 2014 at 3:16 PM, Robert Coli rc...@eventbrite.com wrote:
Don't run 2.1 in production yet if you don't want to deal with bugs like
this in production.
Well, I got the last stable cassandra... going back to 2.0 then.
If you do file a JIRA, please let the list know
On Thu, Sep 25, 2014 at 6:13 AM, shahab shahab.mok...@gmail.com wrote:
It seems that I was not clear in my question, I would like to store values
in the column name, for example column.name would be event_name
(temperature) and column-content would be the respective value (e.g.
40.5) . And I
On Sat, Sep 27, 2014 at 11:08 PM, Pinak Pani
nishant.has.a.quest...@gmail.com wrote:
I wanted to create a trigger that alters the current mutation.
(ObMetaAside : Dear God... why?)
Triggers will probably not survive in their current form. If I was planning
to use them for anything, I would
Isn’t the correct way to do this in CQL3 to use sets and user defined types (in
C* 2.1) ?:
create type sensorreading( date timestamp, name text, value int);
CREATE TABLE sensordata (
name text,
data setfrozen sensorreading,
PRIMARY KEY (name)
);
insert into keyspace2.sensordata (name, data)
Looking through the CQL 3.1 grammar for Cassandra 2.1, I noticed that the
not-equals operator (!=) is in the grammar definition, but I can't seem to
find any legal way to use it.
Is != supported as part of the where clause in Cassandra? Or is it the
grammar for some other purpose?
On Sat, Sep 20, 2014 at 12:11 AM, Erik Forsberg forsb...@opera.com wrote:
I've added all the 15 nodes, with some time inbetween - definitely more
than the 2-minute rule. But it seems like compaction is not keeping up with
the incoming data. Or at least that's my theory.
I personally would
On Sun, Sep 28, 2014 at 3:45 AM, tommaso barbugli tbarbu...@gmail.com
wrote:
I see some data stored in Cassandra (2.0.7) being not readable from CQL;
this affects entire partitions, querying this partitions raise a Java
exception:
If the SSTable is not corrupt but is not readable via CQL and
On Wed, Sep 24, 2014 at 11:01 AM, Gene Robichaux gene.robich...@match.com
wrote:
I just added two nodes, one in DC-A and one in DC-B.
The node in DC-A started and immediately started to stream files from its
piers. The node in DC-B has been in the JOINING state for nearly 24 hours
and I
On Tue, Sep 23, 2014 at 10:31 AM, Donald Smith
donald.sm...@audiencescience.com wrote:
Is there any harm from having all the nodes listed in the seeds list in
cassandra.yaml?
Yes, seed nodes cannot bootstrap.
https://issues.apache.org/jira/browse/CASSANDRA-5836
See comments there for
On Tue, Sep 23, 2014 at 5:47 PM, Tim Heckman t...@pagerduty.com wrote:
As best I could tell, the majority of the file descriptors open were for a
single SSTable '.db' file. Looking in the error logs I found quite a few
exceptions that looked to have been identical:
...
Before opening a JIRA
We have a stateful firewallhttp://en.wikipedia.org/wiki/Stateful_firewall
between data centers for port 7000 (inter-cluster). How long should the idle
timeout be for the connections on the firewall?
Similarly what's appropriate for streaming_socket_timeout_in_ms in
cassandra.yaml? The default
On Sun, Sep 28, 2014 at 9:49 AM, Arthur Zubarev arthur.zuba...@aol.com
wrote:
There are 200+ times more updates and 50x inserts than analytical loads.
In Cassandra to just be able to query (in CQL) on a column I have to have
an index, the question is what tall the fragmentation coming from the
Hi all,
I often have problems with code that I write that uses the DataStax Java
driver to create / modify a keyspace or table and then soon after reads the
metadata for the keyspace to verify that whatever changes I made the
keyspace or table are complete.
As an example, I may create a table
On Mon, Sep 22, 2014 at 6:32 AM, Muthu Kumar smk.mu...@gmail.com wrote:
I am trying to configure a Cassandra cluster with two nodes. I am new
to Cassandra.
I am using datastax distribution of Cassandra ( windows). I have
installed the same in two nodes and configured it works as a
On Mon, Sep 22, 2014 at 3:50 AM, Carlos Scheidecker nando@gmail.com
wrote:
I can successfully read a file to a ByteBuffer and then write to a
Cassandra blob column. However, when I retrieve the value of the column,
the size of the ByteBuffer retrieved is bigger than the original ByteBuffer
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