tomcat - Vaadin web app stops responding until I clear browser data or use Chrome incognito -

-

i have vaadin web app (servlet version 3.0 websocket push) compile war file , deploy on tomcat 8 (on linux 64-bit rhel 6 webserver). use google chrome on home network try connect it.

description

  • after fresh deployment, using google chrome connect it, app works fine (and responsive) first 15-20 minutes of use.

  • after that, stops responding. reload bar gets stuck, , trying reconnect page doesn't work (new tab, new browser instance). chrome stuck on "waiting (host)...".

  • when clear browsing data (all of it), can connect web app normal. also, if use chrome incognito mode (with no browsing history), web app works fine. same true firefox

attempted solutions in tomcat

i tried adding following parameters tomcat context.xml: 

<context cachingallowed="false" cachemaxsize ="0" cachettl="1">

attempted solutions in vaadin

  • i tried connecting webapp ?restartapplication option vaadin
  • i tried 3 different implementations of push (websocket, long polling, streaming)
  • i tried disabling push

none of attempted solutions worked. have ideas? mismanaging user state vaadin stores?

edit

forgot mention, there no traces of exceptions or bad behavior in tomcat logs. in fact there's no output after web app stops responding.

another edit

i forgot mention webserver behind load balancer (google compute engine). friend suggested maybe there's problem load balancer , expired cookies.

i received suggestion vaadin forums:

https://vaadin.com/forum#!/thread/9551763/9568195


Comments

Post a Comment

Popular posts from this blog

c++ - Delete matches in OpenCV (Keypoints and descriptors) -

-
i want check scene image against 2 train images. that, detect features , compute descriptors of both training images. before detecting, computing , matching scene image, delete matches of train1 , train2. because these matches won't facilitate matching of scene image train1 , train2. so, match train1 train2 , vector of matches trainidx , queryidx. how can delete these matches in keypoints-vector , descriptor matrix of train1 , train2? best regards, dwi i have done below: std::vector<cv::keypoint> keypoints[2]; cv::mat descriptor[2]; std::vector< cv::dmatch > matches; /* write code generate keypoints, descriptors , matches here... keypoint[0] -> train image 1 keypoints keypoint[1] -> train image 2 keypoints descriptor[0] -> train image 1 descriptors descriptor[1] -> train image 2 descriptors matches -> matched between train image 1 , 2 */ // logic keep unmatched keypoints , corresponding descriptor
Read more

java - Could not locate OpenAL library -

-
i writing game using slick2d library, uses lwjgl. lwjgl version 2.9.3. using netbeans 8. i tried adding sounds game, example music track on main menu. problem is, exception when run game, despite game still compiling , running except sound of course: sat mar 21 01:23:57 edt 2015 error:could not locate openal library. org.lwjgl.lwjglexception: not locate openal library. @ org.lwjgl.openal.al.create(al.java:156) @ org.lwjgl.openal.al.create(al.java:156) @ org.lwjgl.openal.al.create(al.java:102) @ org.lwjgl.openal.al.create(al.java:206) @ org.newdawn.slick.openal.soundstore$1.run(soundstore.java:295) @ java.security.accesscontroller.doprivileged(native method) @ org.newdawn.slick.openal.soundstore.init(soundstore.java:292) @ org.newdawn.slick.music.<init>(music.java:156) @ org.newdawn.slick.music.<init>(music.java:75) @ view.mainmenu.init(mainmenu.java:58) i didn't include rest of error states error happens in game code. the
Read more

sorting - opencl Bitonic sort with 64 bits keys -

-
i used nvidia sdk bitonic sort , works great me. 32 bits (uint) need ulong keys. have typically 2^14 keys @ time , power of 2. searched on not find kernel designed ulong. i tried modified nvidia sdk bitonic sort using ulong keys not work. kernel not crash after de call clenqueuendrangekernel got error : cl_invalid_command_queue can tell me how modify bitonic sort or radixsort, or can sort ulong keys? i running nvidia quadro 4000 opencl 1.1 cuda 6.5.20 full_profile used original nvidia sdk bitonicsort.cl i used"ulong" keys , value input , ouput instead of "uint" thanks helping i made work-around suit need. used 30 bits of key , 18 high bits of value sorting. changed comparators (2 lines): '#define mask 0xffffc000 // suit need from this: if( (*keya > *keyb) == dir ) this: if(((*keya > *keyb)||((*keya == *keyb)&&((*vala & mask)> (*valb & mask)))) == dir ) it works fine. but, still, it's work-a
Read more