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RE: Render Method Called Twice

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MANOVINAYAK AYYAPPAN, modified 12 Years ago.
Render Method Called Twice
Regular Member Posts: 131 Join Date: 6/13/11 Recent Posts
Hi All,

I am facing this problem, for the first time.

Environment:
Liferay 6.0.6
There is only One Portlet placed in a portal page.
The portlet has a render method with one View.jsp.

The Problem:
The Render method is triggered twice when I hit the URL where the portlet is placed (say http://localhost:8080/listing).

Is this normal behaviour, or is something wrong with my implementation.

Please share your experience on this.
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Subhasis Roy, modified 12 Years ago.
RE: Render Method Called Twice
Expert Posts: 275 Join Date: 1/20/12 Recent Posts
Render method should be called once only. It only gets called at the time of showing the portlet.

Can you share your code snippet
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MANOVINAYAK AYYAPPAN, modified 12 Years ago.
RE: Render Method Called Twice
Regular Member Posts: 131 Join Date: 6/13/11 Recent Posts
I developed a simple portlet with a render method, with the default view.jsp. Nothing much of code involved.
Inside the render method, I had put a test Log message to be displayed.

My Observation:
After deployment of the sample portlet, I found that every time I refreshed the page on which the portlet was placed, the log message appeared twice.
The page on which the portlet was placed, had a custom theme.

When I changed the Theme from Custom to Liferay Classic, I no longer found the issue; the log message appeared only once.

So with Custom theme, the render method gets called twice whereas with standard Classic Theme, it gets called only once.

I have only some JS and CSS included in the custom theme nothing else, wondering why this is happening.
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Tejas Kanani, modified 12 Years ago.
RE: Render Method Called Twice
Liferay Master Posts: 654 Join Date: 1/6/09 Recent Posts
Are you using any custom layout ?
Try by deleting the page and re-create it and add your portlet on it.
Also verify by using any OOTB layout(if you are using custom one).
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MANOVINAYAK AYYAPPAN, modified 12 Years ago.
RE: Render Method Called Twice
Regular Member Posts: 131 Join Date: 6/13/11 Recent Posts
Thanks !!

This happens independent of Portal Page.

I have tried creating a new Portal Page and as well as tried applying my theme to another existing page, the result is same.

And I am using Liferay's one column layout.

I am currently debugging the theme, hope I can find the problematic area.
Avinash babu, modified 12 Years ago.
RE: Render Method Called Twice
New Member Posts: 2 Join Date: 6/25/13 Recent Posts
hi,
I am also facing same problem. My action mapping method is being called twice for single request. if i remove the custom theme it is working fine. how should resolve this issue. Please provide the solution if you find any.
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MANOVINAYAK AYYAPPAN, modified 12 Years ago.
RE: Render Method Called Twice
Regular Member Posts: 131 Join Date: 6/13/11 Recent Posts
Sorry for not updating this.

But I figured out that it was due to my Firefox browser.

I did not find this in other browsers.

I believe some of my Add Ons were causing some problem...
Hazem Farahat, modified 12 Years ago.
RE: Render Method Called Twice
New Member Post: 1 Join Date: 5/13/13 Recent Posts
I am having the same problem in my portlets, and I it has this wrong behaviour on Chrome and Firefox, but works fine on IE. I need to support all browsers.

Have you reached the real cause of this problem?
tong gao, modified 12 Years ago.
RE: Render Method Called Twice
New Member Post: 1 Join Date: 8/3/13 Recent Posts
I have this problem too.And the doView function is same! Have the solution?
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Pierpaolo Cira, modified 12 Years ago.
RE: Render Method Called Twice
Regular Member Posts: 141 Join Date: 2/26/10 Recent Posts
Same for me.... launching a single request and logging url + every originalServletRequest httpParameters (in my request method) I had:
12:08:16,780 INFO  [http-bio-9090-exec-35][RenderPortlet:42] Rendering request... www.try.it/home
12:08:16,781 INFO  [http-bio-9090-exec-35][RenderPortlet:60] -> /c/portal/layout
12:08:16,781 INFO  [http-bio-9090-exec-35][RenderPortlet:64] -> p_l_id : 10431
12:08:16,782 INFO  [http-bio-9090-exec-35][RenderPortlet:64] -> p_v_l_s_g_id : 0
12:08:22,665 WARN  [http-bio-9090-exec-35][404_jsp:109] /html/css/taglib/@theme_image_path@/common/button_bg.png
12:08:22,708 INFO  [http-bio-9090-exec-36][RenderPortlet:42] Rendering request... www.try.it/home
12:08:22,710 INFO  [http-bio-9090-exec-36][RenderPortlet:60] -> /c/portal/layout
12:08:22,710 INFO  [http-bio-9090-exec-36][RenderPortlet:64] -> p_l_id : 10431
12:08:22,711 INFO  [http-bio-9090-exec-36][RenderPortlet:64] -> p_v_l_s_g_id : 0


An interesting behaviour is that, when I load the page, it gives me the first 4 rows.... but browser (Firefox/Chrome/Safari) is waiting for graphical resources (CSS,JS etc...)... after a bit of time it starts to render the page... so it raises the warning (404.jsp) and gives me the last logs (that is a new "request" call).

Do you have any news about?

PS: I use LR6.1.1
PPS: Yes... I confirm that this issue happens only using custom themes
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Pierpaolo Cira, modified 12 Years ago.
RE: Render Method Called Twice
Regular Member Posts: 141 Join Date: 2/26/10 Recent Posts
There is an opened issue, unsolved at the moment: https://issues.liferay.com/browse/LPS-40984
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Jamie Sammons, modified 6 Years ago.
RE: Render Method Called Twice
Junior Member Posts: 53 Join Date: 1/18/14 Recent Posts
Hi All,

I am facing a similar issue in "liferay-dxp-7.1.10-ga1".
In my code I have overridden default render of login portlet. I also have a custom theme deployed to my site. Please see the attached code snippet for more details

​​​​​​​
Issue : Render is getting invoked multiple(3) times.(Because I see repeated entries in my tomcat console log )

Please let me know if  there is some issue with my custom module or if it is a known issue.



Thanks and Regards
Narsingh Pal

Attachments:

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Wole Adetiba, modified 5 Years ago.
RE: Render Method Called Twice
New Member Posts: 12 Join Date: 11/9/07 Recent Posts
Hey Narsingh ,Were you able to resolve this? I am having same issue on "liferay-dxp-7.1.10-ga1"Thanks
Wole