wangab / jdbc-redis Goto Github PK

What steps will reproduce the problem?
1. I have integrated redis in my application to store messages basically to
 to store high through put messages in the redis server . I started the
redis server and apply payload to insert some messages . After some time ,
I came to know there are  huge number of "  23813 ?           0:00
<defunct> " pids created in the server, results in hung state . Please find
the logs below,

Thanks in advance
2.
3.

What is the expected output? What do you see instead?


What version of the product are you using? On what operating system?

redis-0.900 on Solaris- 10


Please provide any additional information below.

Please find my logs below

23 Jul 15:13:36 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:36 - Background saving started by pid 25227
23 Jul 15:13:36 - DB saved on disk
23 Jul 15:13:37 * Background saving error
23 Jul 15:13:38 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:38 - Background saving started by pid 25228
23 Jul 15:13:38 - DB saved on disk
23 Jul 15:13:39 * Background saving error
23 Jul 15:13:40 . DB 0: 17179869184 keys (34359935612 volatile) in
8590019928 slots HT.
23 Jul 15:13:40 . 0 clients connected (0 slaves), 6163 bytes in use
23 Jul 15:13:40 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:40 - DB saved on disk
23 Jul 15:13:40 - Background saving started by pid 25229
23 Jul 15:13:41 * Background saving error
23 Jul 15:13:42 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:42 - DB saved on disk
23 Jul 15:13:42 - Background saving started by pid 25230
23 Jul 15:13:43 * Background saving error
23 Jul 15:13:44 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:44 - Background saving started by pid 25231
23 Jul 15:13:44 - DB saved on disk
23 Jul 15:13:45 . DB 0: 17179869184 keys (34359935612 volatile) in
8590019928 slots HT.
23 Jul 15:13:45 . 0 clients connected (0 slaves), 6163 bytes in use
23 Jul 15:13:45 * Background saving error
23 Jul 15:13:46 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:46 - Background saving started by pid 25232
23 Jul 15:13:46 - DB saved on disk
23 Jul 15:13:47 * Background saving error
23 Jul 15:13:48 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:48 - Background saving started by pid 25233
23 Jul 15:13:48 - DB saved on disk
23 Jul 15:13:49 * Background saving error
23 Jul 15:13:50 . DB 0: 17179869184 keys (34359935612 volatile) in
8590019928 slots HT.
23 Jul 15:13:50 . 0 clients connected (0 slaves), 6163 bytes in use
23 Jul 15:13:50 - 1 changes in 3600 seconds. Saving...
23 Jul 15:13:50 - Background saving started by pid 25234

What steps will reproduce the problem?

1. Create a prepared statement like the following:
PreparedStatement prepStatement = conn.prepareStatement("set ? ?");


2. Use the prepStatement in a loop:

for(int i = 0; i < numberOfOperations; ++i) {
  prepStatement.setString(1, "jdbc-redis-key-prepared-" + i);
  prepStatement.setInt(2, i);
  prepStatement.execute();
}

3. check your redis-server with KEYS *

What is the expected output? What do you see instead?

This should have written *numberOfOperations* keys but it only writes one key.

What version of the product are you using? On what operating system?

I'm running on Ubuntu 9.09 and I'm using jdbc-redis_0.1-beta.jar


Please provide any additional information below.

I found out about this while writing some code to benchmark jdbc-redis. The
benchmark code can be found here: http://pastie.org/635885