I am using the following code to connect to Cassandra 0.7.0 using
PHPcassa (thobbs)
However I am able to connect to cassandra instance through
cassandra-cli at command prompt but not through this php script.
On Mon, Dec 20, 2010 at 11:10 AM, Nick Bailey wrote:
> It would probably help if y
I was unable to find example or documentation on my question. I'd like to know
what the best way to group a cluster of cassandra nodes behind a virtual ip.
For example, can cassandra nodes be placed behind a Citrix Netscaler hardware
load balancer?
I can't imagine it being a problem, but in
Have you created Keyspace1? Looks like phpcassa requires you to set a
keyspace when you connect but the cli would not. Which might explain why you
are seeing problems.
On Mon, Dec 20, 2010 at 5:42 AM, Rajkumar Gupta wrote:
> I am using the following code to connect to Cassandra 0.7.0 using
> PHPc
Keyspace1 is included by default in the cassandra.yaml file and I
imported the schema before running the php script
so I hope that is not the problem..
I am now too much frustrated with this problem..:( and this is just
the beginning of my Cassandra experiments
On Mon, Dec 20, 2010 at 8:36 PM
You will loose part of the retry / fallback functionality offered by hector.
The job of the client lib is not only load-balancing. I.e. if a node is
bootstrapping it will accept TCP connections but throw an exception which will
be communicated via thrift. The client lib is supposed to handle tha
On Sun, Dec 19, 2010 at 10:37 PM, Dave Viner wrote:
> Can you share the code for run_column_family_stores.sh ?
>
> On Sun, Dec 19, 2010 at 6:14 PM, Edward Capriolo
> wrote:
>>
>> On Sun, Dec 19, 2010 at 2:01 PM, Ran Tavory wrote:
>> > Mx4j is in process, same jvm, you just need to throw mx4j-too
You can put a Cassandra cluster behind a load balancer. One thing to be
cautious of is the health check. Just because the node is listening on port
9160 doesn't mean that it's healthy to serve requests. It is required, but
not sufficient.
The real test is the JMX values.
Dave Viner
On Mon, D
Just to verify the keyspace exists can you run 'use Keyspace1;' in the cli?
Also it looks like you were using 0.6.8 and now you are using 0.7.0? What is
the exact error you are seeing now?
On Mon, Dec 20, 2010 at 10:21 AM, Rajkumar Gupta wrote:
> Keyspace1 is included by default in the cassandra.
Thanks guys.
On Dec 20, 2010, at 5:44 PM, Dave Viner wrote:
> You can put a Cassandra cluster behind a load balancer. One thing to be
> cautious of is the health check. Just because the node is listening on port
> 9160 doesn't mean that it's healthy to serve requests. It is required, but
Nick,
Sorry I can not currently access my computer on which cassandra is
installed but yes, earlier I used the 'show keyspaces;' command & it
correctly showed me the keyspace1 with corresponding column families.
Yes I was using Cassandra 0.6.8 earlier and now I have switched to
0.7. Since I was us
So it looks like phpcassa doesn't log any errors. The error you are seeing
is because the connection to the first server failed and there are no more
servers to try. It doesn't say why it failed though. The only thing i can
reccommend is on line 57 of connection.php to add a line to print out the
e
I have been having severe and strange reliability problems within my
Cassandra cluster. This weekend, all four of my nodes were down at once.
Even now I am loosing one every few hours. I have attached output from all
the system monitoring commands I can think of.
What seems to happen is that the j
Have you tried to send a KILL -3 to the Cassandra process before you send
KILL -9? This way you will see what the threads are doing (and maybe
blocking). The majority of the threads may give you the right spot where to
look for the problem.
I'm not much of a good linux administrator, but when some
Current versions of Hector will mark the host as temporarily down if a
connection times out (retrying N seconds later; defaults to 10). If
you only have one host in your list, this will be an issue. It would
be a good idea to use more than one VIP for this reason.
Managing configurations on the ap
> be correlated is the flushing of memtables tables. One of the strangest
> stats I am getting when in this state is memory paging: 3727168.00 pages
> scanned/second (see sar -B output). Occasionally, if I leave the process
> alone (~1 h) it recovers (maybe 1 in 5 times), otherwise the only way to
Yes, Nick's suggestion is good. I've added a logging statement at that
point in the latest commit to phpcassa. Perhaps you could try that and see
what the error is?
- Tyler
On Mon, Dec 20, 2010 at 12:35 PM, Nick Bailey wrote:
> So it looks like phpcassa doesn't log any errors. The error you a
Yes, I have tried that (although only twice). Same impact as a regular kill:
nothing happens and I get no stacktrace output. It is however on my list of
things to try again the next time a node dies. I am also not able to attach
jstack to the process.
I have also tried disabling JNA (did not
What filesystem are you using? You might try EXT3 or 4 vs. XFS as another area
of diversity. It sounds as if the page cache or filesystem is messed up. Are
there any clues in /var/log/messages? How much swap space do you have
configured?
The kernel level debug stuff I know is all for Solaris un
> There were a couple of threads on lkml recently that may be relevant,
> but I have to run so I can't find the URL:s atm (todo later tonight).
Ok, I cannot figure out how to find the "first" message in a thread in
any of the lkml archives, but these two threads may be of interest,
especially if y
On Mon, Dec 20, 2010 at 2:13 PM, Dan Hendry wrote:
> Yes, I have tried that (although only twice). Same impact as a regular
> kill: nothing happens and I get no stacktrace output. It is however on my
> list of things to try again the next time a node dies. I am also not able to
> attach jstack to
What kernel version are you running? I have seen with I/O intense nodes with
2.6.18 to 2.6.24 the kernel has a bug where it locks the JVM and spins to
100%.
On Mon, Dec 20, 2010 at 1:14 PM, Brandon Williams wrote:
> On Mon, Dec 20, 2010 at 2:13 PM, Dan Hendry wrote:
>
>> Yes, I have tried that (
Thanks for all the response, I have included requested information below. As
a side note, I THINK I have fixed the problem by using "disk_access_mode:
mmap_index_only". At the very least, none of the nodes has died since
setting the option.
> What kernel version are you running?
3/4 running
I will try it out & let you know soon..
Thanks
On Tue, Dec 21, 2010 at 1:20 AM, Tyler Hobbs wrote:
> Yes, Nick's suggestion is good. I've added a logging statement at that
> point in the latest commit to phpcassa. Perhaps you could try that and see
> what the error is?
>
> - Tyler
>
> On Mon,
Can anybody recommend a stable enough JDK environment for 0.6.x branch on
ubuntu server?
Thank you!
best regards,
hanzhu
On Sun, Dec 19, 2010 at 10:29 AM, Zhu Han wrote:
> The problem seems still like the C-heap of JVM, which leaks 70MB every day.
> Here is the summary:
>
> on 12/19:
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