[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.
01/15/2009 at 02:41AM PST, ID: 24054022
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!
8.7

Connection pool error - cannot get connection

Asked by gublooo in Apache Tomcat Application Server, Spring, MySQL Server

Tags: Tomcat Connection Pool, Mysql, Spring

Dear Experts,

I run an ecommerce website and I'm doing load testing on the site to see what load it can handle. When I run the case 1000 users in 1 hour, the site breaks down and I start getting the error messages below in the log files.

What settings do I need to change to take care of this. This is the current setup for my DB: I'm using tomcats DBCP connection pool

Thanks

<Context reloadable="true">
  <Resource name="jdbc/discountweb" auth="Container" type="javax.sql.DataSource" maxActive="100" maxIdle="16"
    maxWait="1000" username="xxxxx" password="xxxxx" driverClassName="com.mysql.jdbc.Driver"
    url="jdbc:mysql://localhost/xxxx?autoreconnect=true" />
</Context>



*****************************************************************************************
This is the error message:

ERROR 2009-01-15 15:35:56,201 [QuartzScheduler_DS-govasool-labs.com1231967805483_ClusterManager] - ClusterManager: Error managing cluster: Failed to obtain DB connection from data source 'springNonTxDataSource.DS': org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object
org.quartz.JobPersistenceException: Failed to obtain DB connection from data source 'springNonTxDataSource.DS': org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object [See nested exception: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object]
    at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:1454)
    at org.quartz.impl.jdbcjobstore.JobStoreCMT.doCheckin(JobStoreCMT.java:1374)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport$ClusterManager.manage(JobStoreSupport.java:2378)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport$ClusterManager.run(JobStoreSupport.java:2409)
* Nested Exception (Underlying Cause) ---------------
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object
    at org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:104)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
    at org.springframework.jdbc.datasource.UserCredentialsDataSourceAdapter.doGetConnection(UserCredentialsDataSourceAdapter.java:161)
    at org.springframework.jdbc.datasource.IsolationLevelDataSourceAdapter.doGetConnection(IsolationLevelDataSourceAdapter.java:127)
    at org.springframework.jdbc.datasource.UserCredentialsDataSourceAdapter.getConnection(UserCredentialsDataSourceAdapter.java:132)
    at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
    at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:111)
    at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:1431)
    at org.quartz.impl.jdbcjobstore.JobStoreCMT.doCheckin(JobStoreCMT.java:1374)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport$ClusterManager.manage(JobStoreSupport.java:2378)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport$ClusterManager.run(JobStoreSupport.java:2409)
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
    at org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:958)
    at org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:96)
    ... 10 more
[+][-]01/15/09 04:24 AM, ID: 23382613

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]01/15/09 04:53 AM, ID: 23382814

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]01/15/09 05:21 AM, ID: 23382964

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]01/15/09 06:49 AM, ID: 23383811

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]01/16/09 10:32 AM, ID: 23395853

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]01/16/09 10:55 AM, ID: 23396107

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]01/16/09 10:58 AM, ID: 23396144

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]01/16/09 11:34 AM, ID: 23396543

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]01/16/09 11:42 AM, ID: 23396616

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]01/16/09 12:01 PM, ID: 23396796

View this solution now by starting your 30-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

 

About this solution

Zones: Apache Tomcat Application Server, Spring, MySQL Server
Tags: Tomcat Connection Pool, Mysql, Spring
Sign Up Now!
Solution Provided By: crossdev
Participating Experts: 2
Solution Grade: A
 
 
 
Loading Advertisement...
20090824-EE-VQP-74 - Hierarchy / EE_QW_3_20080625