0004994: AsyncQueue can become stuck

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Severity

Reproducibility

Date Submitted

Last Update

0004994

[Resin]

minor

always

03-21-12 11:48

07-24-12 15:13

Reporter

ferg

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Status

closed

Product Version

4.0.27

Summary

0004994: AsyncQueue can become stuck

Description

(rep by Yen-Fen Hsu)

We are using Resin 4.0.24 with lots of CDI.

We have a web app that invokes an asynchronous method (annotated with @Asynchronous) for every incoming request. The method performs multiple DB lookups and insert or update multiple tables. We are seeing under heavy load the asynch method gets stuck sometimes. Breaking up the operations into 2 asynch methods does not help either.

Could you explain the underlying implementation of the AsychQueue and @Asychronous?

How many AsynchQueue is there? Does it grow/shrink based on the load?

Is there a queue for each AsynchQueue? What happen when there is a spike invoking the same aynch method?

Is @Asychronous suitable for resource-light/fast operations only? Should applications build their own queue to back up the aynch method?

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Issue History
Date Modified	Username	Field	Change
03-21-12 11:48	ferg	New Issue
07-24-12 15:13	ferg	Assigned To	=> ferg
07-24-12 15:13	ferg	Status	new => closed
07-24-12 15:13	ferg	Resolution	open => fixed
07-24-12 15:13	ferg	Fixed in Version	=> 4.0.30

Mantis 1.0.0rc3[^]

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