Re: what is "Exception while swapping" ?
Thanks, that's a good idea. We'll try implementing SingleThreadModel to see if that has a positive effect. BenG. Haseltine, Celeste wrote: >The swapRunnable and run methods clearly point to Thread execution in JRUN. >My guess is that you have a thread conflict, or possible a "race" condition >between two execution threads, which is causing your product to "lock-up" >while waiting for one of the threads to complete execution. Without seeing >your code I am making a total guess, but is your servlet code designed to be >multi-threaded, or did you design it to be single threading only? If it is >designed to be multi-threaded, did you synchronize the methods in your >servelet class that require synchronization. Also, if your servlet is >accessing your db, are you using a driver that can implement connection >pooling (i.e. pull a connection thread out of the connection pool), and if >so, did you select the connection pooling checkbox in the JRUN JDBC console? >Those are just a few educated guesses as to the things I would look into >without knowing more about your servlet code. > >Hope this helps!!! > >Celeste > > > >-Original Message- >From: Ben Groeneveld [mailto:[EMAIL PROTECTED]] >Sent: Wednesday, August 08, 2001 12:08 PM >To: JRun-Talk >Subject: what is "Exception while swapping" ? > > >In an attempt to debug what appears to be a lockup we turned debug on in >logging. One thing we see is this: > >-- >08/07 16:04:43 info (JRun) f_req_drw_Servlet.doGet END >08/07 16:05:00 debug (web) web-480 caught Exception while swapping >[java.lang.InterruptedException] >java.lang.InterruptedException >at allaire.jrun.http.WebService.swapRunnable(WebService.java:118) >at allaire.jrun.ThreadPool.swapRunnable(ThreadPool.java:223) >at allaire.jrun.WorkerThread.run(WorkerThread.java:77) > >08/07 16:05:10 debug (web) Limiting InputStream read to '-2' bytes to >maintain keepalive. >08/07 16:05:10 info (JRun) f_req_drw_Servlet.doPost BEGIN >-- > >The END / BEGIN info's signify our code appears fine. Can someone clue >me in on what this might mean? Thanks, BenG. > -- Ben Groeneveld Information Concepts, Inc., 115 N.W. Oregon, Suite 30, Bend, OR 97701 Mailto:[EMAIL PROTECTED], phone:541.388.3611, cell:208.520.6488 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/jrun-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: what is "Exception while swapping" ?
The swapRunnable and run methods clearly point to Thread execution in JRUN. My guess is that you have a thread conflict, or possible a "race" condition between two execution threads, which is causing your product to "lock-up" while waiting for one of the threads to complete execution. Without seeing your code I am making a total guess, but is your servlet code designed to be multi-threaded, or did you design it to be single threading only? If it is designed to be multi-threaded, did you synchronize the methods in your servelet class that require synchronization. Also, if your servlet is accessing your db, are you using a driver that can implement connection pooling (i.e. pull a connection thread out of the connection pool), and if so, did you select the connection pooling checkbox in the JRUN JDBC console? Those are just a few educated guesses as to the things I would look into without knowing more about your servlet code. Hope this helps!!! Celeste -Original Message- From: Ben Groeneveld [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 08, 2001 12:08 PM To: JRun-Talk Subject: what is "Exception while swapping" ? In an attempt to debug what appears to be a lockup we turned debug on in logging. One thing we see is this: -- 08/07 16:04:43 info (JRun) f_req_drw_Servlet.doGet END 08/07 16:05:00 debug (web) web-480 caught Exception while swapping [java.lang.InterruptedException] java.lang.InterruptedException at allaire.jrun.http.WebService.swapRunnable(WebService.java:118) at allaire.jrun.ThreadPool.swapRunnable(ThreadPool.java:223) at allaire.jrun.WorkerThread.run(WorkerThread.java:77) 08/07 16:05:10 debug (web) Limiting InputStream read to '-2' bytes to maintain keepalive. 08/07 16:05:10 info (JRun) f_req_drw_Servlet.doPost BEGIN -- The END / BEGIN info's signify our code appears fine. Can someone clue me in on what this might mean? Thanks, BenG. -- Ben Groeneveld Information Concepts, Inc., 115 N.W. Oregon, Suite 30, Bend, OR 97701 Mailto:[EMAIL PROTECTED], phone:541.388.3611, cell:208.520.6488 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/jrun-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: what is "Exception while swapping" ?
Hi Ben, To interrupt a sleeping thread you have make it throw an InterruptedException. This is just a normal side-effect of programmatically swapping threads. It shouldn't be logged, IMO, but it is, and it causes people to ask about it frequently. Scott Stirling JRun QA Macromedia > -Original Message- > From: Ben Groeneveld [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, August 08, 2001 1:08 PM > To: JRun-Talk > Subject: what is "Exception while swapping" ? > > > In an attempt to debug what appears to be a lockup we turned > debug on in > logging. One thing we see is this: > > -- > 08/07 16:04:43 info (JRun) f_req_drw_Servlet.doGet END > 08/07 16:05:00 debug (web) web-480 caught Exception while swapping > [java.lang.InterruptedException] > java.lang.InterruptedException > at allaire.jrun.http.WebService.swapRunnable(WebService.java:118) > at allaire.jrun.ThreadPool.swapRunnable(ThreadPool.java:223) > at allaire.jrun.WorkerThread.run(WorkerThread.java:77) > > 08/07 16:05:10 debug (web) Limiting InputStream read to '-2' bytes to > maintain keepalive. > 08/07 16:05:10 info (JRun) f_req_drw_Servlet.doPost BEGIN > -- > > The END / BEGIN info's signify our code appears fine. Can > someone clue > me in on what this might mean? Thanks, BenG. > > -- > Ben Groeneveld > Information Concepts, Inc., 115 N.W. Oregon, Suite 30, Bend, OR 97701 > Mailto:[EMAIL PROTECTED], phone:541.388.3611, cell:208.520.6488 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/jrun-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
what is "Exception while swapping" ?
In an attempt to debug what appears to be a lockup we turned debug on in logging. One thing we see is this: -- 08/07 16:04:43 info (JRun) f_req_drw_Servlet.doGet END 08/07 16:05:00 debug (web) web-480 caught Exception while swapping [java.lang.InterruptedException] java.lang.InterruptedException at allaire.jrun.http.WebService.swapRunnable(WebService.java:118) at allaire.jrun.ThreadPool.swapRunnable(ThreadPool.java:223) at allaire.jrun.WorkerThread.run(WorkerThread.java:77) 08/07 16:05:10 debug (web) Limiting InputStream read to '-2' bytes to maintain keepalive. 08/07 16:05:10 info (JRun) f_req_drw_Servlet.doPost BEGIN -- The END / BEGIN info's signify our code appears fine. Can someone clue me in on what this might mean? Thanks, BenG. -- Ben Groeneveld Information Concepts, Inc., 115 N.W. Oregon, Suite 30, Bend, OR 97701 Mailto:[EMAIL PROTECTED], phone:541.388.3611, cell:208.520.6488 ~~ Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm Archives: http://www.mail-archive.com/jrun-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
