Question

Set timeout in Informix JDBC connection?

Asked by: ChristoferDutz

Hi experts,

In one of my projects I am having some strange Problems. Even if they occur about every 3-4 Months, I would like to get rid of them.

The problem is that I have a JDBC connection to an Informix database and use this to log changes to my data. Now about every 3-4 Months a JDBC request hangs and never returns.

Is there a way to make the JDBC driver terminate a query if it takes too long? What I want is to set a timeout to about 5 seconds (It's a really simple insert of one row of data).

Chris

PS: Is a thread dump of the hanging thread.

Thread-1022 "[STUCK] ExecuteThread: '11' for queue: 'weblogic.kernel.Default (self-tuning)'" <alive, in native, suspended, priority=1, DAEMON> {
    jrockit.net.SocketNativeIO.readBytesPinned(SocketNativeIO.java:???)
    jrockit.net.SocketNativeIO.socketRead(SocketNativeIO.java:31)
    java.net.SocketInputStream.socketRead0(SocketInputStream.java:???)
    java.net.SocketInputStream.read(SocketInputStream.java:107)
    java.io.BufferedInputStream.fill(BufferedInputStream.java:189)
    java.io.BufferedInputStream.read1(BufferedInputStream.java:247)
    java.io.BufferedInputStream.read(BufferedInputStream.java:304)
    ^-- Holding lock: java.io.BufferedInputStream@23a7b64[thin lock]
    com.informix.asf.IfxDataInputStream.readFully(IfxDataInputStream.java:133)
    com.informix.asf.IfxDataInputStream.readSmallInt(IfxDataInputStream.java:443)
    com.informix.jdbc.IfxSqli.receiveMessage(IfxSqli.java:2254)
    com.informix.jdbc.IfxSqli.executeCommand(IfxSqli.java:742)
    com.informix.jdbc.IfxResultSet.b(IfxResultSet.java:259)
    com.informix.jdbc.IfxStatement.c(IfxStatement.java:1241)
    com.informix.jdbc.IfxPreparedStatement.executeUpdate(IfxPreparedStatement.java:402)
    sun.reflect.GeneratedMethodAccessor978.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:570)
    org.apache.avalon.excalibur.datasource.AbstractJdbcConnection$ProxiedObject.invoke(AbstractJdbcConnection.java:468)
    $Proxy55.executeUpdate(Unknown Source)
.
.
.
.
.
.

                                  
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:

Select allOpen in new window

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2009-07-13 at 00:59:28ID24564575
Tags

Informix

,

JDBC

,

timeout

Topic

Informix Database

Participating Experts
1
Points
250
Comments
12

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. Jdbc to Informix
    Im trying to get any kind of connection to a Informix database from a java applet. Im using version 7.24. I have set CLASSPATH to the infromix.jar file and LD_LIBRARY_PATH to sparc directory. And when i try to run a javaprogram to access the database I get: ld.so.1: /pkg/jav...
  2. JDBC
    1)I have Oracle Drivers loaded in my system. But I want some code and the procedure on how to connect to the database. 2) Also my next question is what are the 2 layer in JDBC 3)Does the "out" Variable in System.out belong to the System class or the dataOutputs...
  3. JDBC
    1) I inserted a record into a table. The only key of the table is an auto-increment number. How can I get the key of the just added record? Now, I use a transaction of two queries to achive the goal: a) insert the row b) select the max auto number Are there other w...

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: tangchunfengPosted on 2009-07-13 at 03:44:41ID: 24838529

I found you use
org.apache.avalon.excalibur.datasource.AbstractJdbcConnection
to manage jdbcConnection,
maybe you can change to use jdbc connection pool managed by weblogic

 

by: ChristoferDutzPosted on 2009-07-13 at 04:01:33ID: 24838590

Well I am using a Cocoon application and it is deployed on tomcat in the test environment and on Weblogic on the production environment. I would really like to have both configurations the same. I know the MySQL driver starts a thread monitoring JDBC threads and trminates long running operations. Does something like this exist for Informix? Is there a parameter I can add to the JDBC connection string?

 

by: tangchunfengPosted on 2009-07-13 at 16:37:37ID: 24845037

what's your version of tomcat/weblogic/informix jdbc/informix server?

 

by: tangchunfengPosted on 2009-07-13 at 16:51:58ID: 24845104

INFORMIXCONTIME
Sets the timeout period for an attempt to connect to the database server. If a connection attempt does not succeed in this time, the attempt is aborted and a connection error is reported. The default value is 0 seconds. This variable adds timeouts for blocking socket methods and for socket connections.
This parameter is effective in Informix JDBC 3.0.

 

by: tangchunfengPosted on 2009-07-13 at 17:00:12ID: 24845149

http://forums.sun.com/thread.jspa?threadID=5266195&start=0

By this URL, this may be a  performance problem of db lock.
Ask your DBA to investigate db lock when the thread is stuck.

 

by: ChristoferDutzPosted on 2009-07-14 at 01:19:15ID: 24847185

Unfortunately this link didnt help a lot and the Parameter seems to affect only the connections to the db. The connection is not an issue here (by the way ... the default timeout is 60 seconds ... I know this because initially we were having problems with the connection timeout). Indeed the problem was with the Database Server undfortunately I couldn't find a way to recover the blocked thread (which blocks some important system resources).

The solution I have come up with was to create a sort of "TimebombThread" that sends the Thread that creates it a Signal if it is not disabled within 5 seconds. After processing the statement the timebomb is manually disabled. This sort of does the trick, but I would have liked to have something like this in the driver as it is in MySQL.

 

by: tangchunfengPosted on 2009-07-15 at 23:09:18ID: 24866728

I find a parameter in weblogic connection pool :  Statement Timeout
If you change to use weblogic managed connection pool, you will have the funcationality of "TimebombThread"

 

by: tangchunfengPosted on 2009-07-15 at 23:13:21ID: 24866744


And if you use Informix JDBC 3.00.JC3 and above,
you can add Statement.setQueryTimeout()  to your code.

http://publib.boulder.ibm.com/infocenter/idshelp/v10/index.jsp?topic=/com.ibm.docnotes.doc/uc5/jdbc_docnotes_3.00.html

 

by: tangchunfengPosted on 2009-07-16 at 00:52:35ID: 24867225

I tried with some Java program.

// 1 second
stmt.setQueryTimeout(1);

and execute a long running query, you will get

java.sql.SQLException: Statement interrupted by user.
      at com.informix.jdbc.IfxSqli.a(IfxSqli.java:3204)
      at com.informix.jdbc.IfxSqli.E(IfxSqli.java:3518)
      at com.informix.jdbc.IfxSqli.dispatchMsg(IfxSqli.java:2353)
      at com.informix.jdbc.IfxSqli.receiveMessage(IfxSqli.java:2269)
      at com.informix.jdbc.IfxSqli.a(IfxSqli.java:1532)
      at com.informix.jdbc.IfxSqli.executeStatementQuery(IfxSqli.java:1471)
      at com.informix.jdbc.IfxSqli.executeStatementQuery(IfxSqli.java:1401)
      at com.informix.jdbc.IfxResultSet.a(IfxResultSet.java:204)
      at com.informix.jdbc.IfxStatement.executeQueryImpl(IfxStatement.java:1212)
      at com.informix.jdbc.IfxStatement.executeQuery(IfxStatement.java:202)
      at jdbc.InformixJdbcSelect.main(InformixJdbcSelect.java:35)
Caused by: java.sql.SQLException: ISAM error: Interrupted ISAM call
      at com.informix.util.IfxErrMsg.getSQLException(IfxErrMsg.java:373)
      at com.informix.jdbc.IfxSqli.E(IfxSqli.java:3523)
      ... 9 more

 

by: tangchunfengPosted on 2009-07-16 at 01:05:36ID: 24867301

and you can add "QueryTimeout=5" to the informix jdbc url

 

by: ChristoferDutzPosted on 2009-07-16 at 01:13:11ID: 31602731

Hi tangchunfeng,

thanks for that ... I remember having a look at that method a few years ago ... unfortunately in those days it was unsupported. My customer updated to a new release of Informix and now I can use it ... thanks for that hint :-)

 

by: tangchunfengPosted on 2009-07-16 at 01:14:36ID: 24867351

"jdbc:informix-sqli://192.168.1.180:9088/benchmark:INFORMIXSERVER=demo_on;user=informix;password=informix;QueryTimeout=1"

seems not working, just forget it

although it's documented by bea
http://edocs.bea.com/wls/docs103/jdbc_drivers/informix.html

I'm using INFORMIX 11.50.UC4 and
IBM Informix JDBC Driver Version 3.00.JC3
IBM Informix JDBC Driver Version 3.50.JC4DE( included with 11.50.UC4)

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...