0001723: JSP: ResourceBundle caching

1723

minor

always

05-01-07 09:06

05-15-07 13:28

Reporter:

ferg

Platform:

Assigned To:

ferg

OS:

Priority:

normal

OS Version:

Status:

closed

Product Version:

Product Build:

Resolution:

fixed

Projection:

none

ETA:

none

Fixed in Version:

3.1.1

Summary:

0001723: JSP: ResourceBundle caching

Description:

(rep by Fred Douthit)

We are having what looks like resource contention for resource bundles. It appears that we are using the resin implementation of bean:message. What I am seeing appears to be resource contention load bundles from the file system which should have been cached. See the section Relevant Information 1st, but also, SERVER-WIDE STACK DUMP, for a more complete thread dump. What I am looking for is an idea why this is happening but more importantly, how I can resolve it.

Thanks!

Fred

Relevant information
· We are using resin-pro-3.0.14.
· Performance testing found MANY threads in the application appear to block on:
java.lang.Class.forName0 (native method) - see stack trace attached.
· The method is native. It is possible that there is a critical section which is causing the code to single thread through this code. This behavior appears to be intrinsic to Sun's implementation.
· The underlying issue is that the code reads and parses ApplicationResources.properties and MoreApplicationResources.properties again and again.
· While the code is designed to cache the file contents it doesn't.
· These files are loaded from the file system.
· These files are referenced from between 0 and more than 60 times per jsp page.
· A typical reference looks like the following:
<bean:message key="custgroup.condition.label.abandcart"/>
· They contain name value pairs which look like the following:
tools.tax.state=State

Fraction of stack trace
  [1] java.lang.Class.forName0 (native method)
  [2] java.lang.Class.forName (Class.java:242)
  [3] com.caucho.jsp.BundleManager.getBaseBundle (BundleManager.java:202)
  [4] com.caucho.jsp.BundleManager.getBundle (BundleManager.java:144)
  [5] com.caucho.jsp.PageContextImpl.getBundle (PageContextImpl.java:1,164)
  [6] com.caucho.jsp.PageContextImpl.getLocalizedMessage (PageContextImpl.java:1,133)
  [7] _jsp._nav._TopNav__jsp._jspService (TopNav.jsp:46)

Steps To Reproduce:

Additional Information:

Relationships

Attached Files:

Mantis - Resin
Viewing Issue Advanced Details

ID:	Category:	Severity:	Reproducibility:	Date Submitted:	Last Update:
1723		minor	always	05-01-07 09:06	05-15-07 13:28

Reporter:	ferg	Platform:
Assigned To:	ferg	OS:
Priority:	normal	OS Version:
Status:	closed	Product Version:
Product Build:		Resolution:	fixed
Projection:	none
ETA:	none	Fixed in Version:	3.1.1

Summary:	0001723: JSP: ResourceBundle caching
Description:	(rep by Fred Douthit) We are having what looks like resource contention for resource bundles. It appears that we are using the resin implementation of bean:message. What I am seeing appears to be resource contention load bundles from the file system which should have been cached. See the section Relevant Information 1st, but also, SERVER-WIDE STACK DUMP, for a more complete thread dump. What I am looking for is an idea why this is happening but more importantly, how I can resolve it. Thanks! Fred Relevant information · We are using resin-pro-3.0.14. · Performance testing found MANY threads in the application appear to block on: java.lang.Class.forName0 (native method) - see stack trace attached. · The method is native. It is possible that there is a critical section which is causing the code to single thread through this code. This behavior appears to be intrinsic to Sun's implementation. · The underlying issue is that the code reads and parses ApplicationResources.properties and MoreApplicationResources.properties again and again. · While the code is designed to cache the file contents it doesn't. · These files are loaded from the file system. · These files are referenced from between 0 and more than 60 times per jsp page. · A typical reference looks like the following: <bean:message key="custgroup.condition.label.abandcart"/> · They contain name value pairs which look like the following: tools.tax.state=State Fraction of stack trace [1] java.lang.Class.forName0 (native method) [2] java.lang.Class.forName (Class.java:242) [3] com.caucho.jsp.BundleManager.getBaseBundle (BundleManager.java:202) [4] com.caucho.jsp.BundleManager.getBundle (BundleManager.java:144) [5] com.caucho.jsp.PageContextImpl.getBundle (PageContextImpl.java:1,164) [6] com.caucho.jsp.PageContextImpl.getLocalizedMessage (PageContextImpl.java:1,133) [7] _jsp._nav._TopNav__jsp._jspService (TopNav.jsp:46)
Steps To Reproduce:
Additional Information:
Relationships
Attached Files: