Java web start - Unable to load resource

Question

I ve got a jar that loads great with java web start when I browse through the IP address of the server  Once I try the server name instead I get the following exception    com sun deploy net FailedDownloadException  Unable to load resource      at com sun deploy net DownloadEngine actionDownload Unknown Source      at com sun deploy net DownloadEngine getCacheEntry Unknown Source      at com sun deploy net DownloadEngine getCacheEntry Unknown Source      at com sun deploy net DownloadEngine getResourceCacheEntry Unknown Source      at com sun deploy net DownloadEngine getResourceCacheEntry Unknown Source      at com sun deploy net DownloadEngine getResource Unknown Source      at com sun javaws LaunchDownload DownloadTask call Unknown Source      at java util concurrent FutureTask Sync innerRun Unknown Source      at java util concurrent FutureTask run Unknown Source      at java util concurrent ThreadPoolExecutor Worker runTask Unknown Source      at java util concurrent ThreadPoolExecutor Worker run Unknown Source      at java lang Thread run Unknown Source    The wrapped exception    java io FileNotFoundException     at sun reflect GeneratedConstructorAccessor2 newInstance Unknown Source    at sun reflect DelegatingConstructorAccessorImpl newInstance Unknown Source    at java lang reflect Constructor newInstance Unknown Source    at sun net www protocol http HttpURLConnection 6 run Unknown Source    at java security AccessController doPrivileged Native Method    at sun net www protocol http HttpURLConnection getChainedException Unknown Source    at sun net www protocol http HttpURLConnection getInputStream Unknown Source    at com sun deploy net BasicHttpRequest doRequest Unknown Source    at com sun deploy net BasicHttpRequest doRequest Unknown Source    at com sun deploy net BasicHttpRequest doGetRequest Unknown Source    at com sun deploy net DownloadEngine actionDownload Unknown Source    at com sun deploy net DownloadEngine getCacheEntry Unknown Source    at com sun deploy net DownloadEngine getCacheEntry Unknown Source    at com sun deploy net DownloadEngine getResourceCacheEntry Unknown Source    at com sun deploy net DownloadEngine getResourceCacheEntry Unknown Source    at com sun deploy net DownloadEngine getResource Unknown Source    at com sun javaws LaunchDownload DownloadTask call Unknown Source    at java util concurrent FutureTask Sync innerRun Unknown Source    at java util concurrent FutureTask run Unknown Source    at java util concurrent ThreadPoolExecutor Worker runTask Unknown Source    at java util concurrent ThreadPoolExecutor Worker run Unknown Source    at java lang Thread run Unknown Source  Caused by  java io FileNotFoundException     at sun net www protocol http HttpURLConnection getInputStream Unknown Source    at java net HttpURLConnection getResponseCode Unknown Source        15 more   JNLP    lt  xml version  1 0  encoding  utf-8   gt   lt jnlp     spec  1 0       codebase  http   servername Site Views         href    gt       lt information gt           lt title gt title lt  title gt           lt vendor gt vendor lt  vendor gt           lt description gt description lt  description gt           lt description kind  short  gt short lt  description gt           lt icon href        icon gif    gt       lt  information gt       lt security gt           lt all-permissions  gt       lt  security gt       lt resources gt            lt j2se version  1 5   java-vm-args  -Xmx1000M -Xms150M  initial-heap-size  150M  max-heap-size  1000M    gt           lt j2se version  1 4 2   href  http   java sun com products autodl j2se  java-vm-args  -Xmx1000M -Xms150M  initial-heap-size  150M  max-heap-size  1000M    gt            lt jar href   file jar   gt       lt  resources gt       lt application-desc main-class  com      gt           lt argument gt CD6B172DEC34924D83EA64A61A6550BE1271325929392 lt  argument gt           lt argument gt http   servername file asp lt  argument gt           lt argument gt  Site lt  argument gt       lt  application-desc gt   lt  jnlp gt    Any idea what should I look for

User · Answer

i got the same issue  i updated the hosts file with the server address and it worked

User · Answer

Include your IP address in your host file  C  Windows System32 drivers etc host  for the respective server   Sample Entry   10 100 101 102  server1 us vijay com        Vijay s Server

User · Answer

In Advance Tab - gt  scroll down and un-checked all options in advance security setting and try by checking one-by-one and finally app start running with one option TLS 1 1 that was the solution I got it

User · Answer

I m not sure exactly what the problem is  but I have looked at one of my jnlp files and I have put in the full path to each of my jar files    I have a velocity template that generates the app jnlp file which places it in all the correct places when my maven build runs   One thing I have seen happen is that the jnlp file is re-downloaded by the by the webstart runtime  and it uses the href attribute  which is left blank in your jnlp file  to re-download the file   I would start there  and try adding the full path into the jnlp files too   I ve found webstart to be a fickle mistress

User · Answer

changing java proxy settings to direct connection did not fix my issue   What worked for me    Run  Configure Java  as administrator  Go to Advanced Scroll to bottom  Under   Advanced Security Settings  uncheck  Use SSL 2 0 compatible ClientHello format   Save

User · Answer

this also worked for me   thanks a lot changing java proxy settings to direct connection did not fix my issue  What worked for me  Run  quot Configure Java quot  as administrator  Go to Advanced Scroll to bottom Under   quot Advanced Security Settings quot  uncheck  quot Use SSL 2 0 compatible ClientHello format quot  Save

User · Answer

Try using Janela or github to diagnose the problem

User · Answer

If anyone else gets here because they re trying to set up a Jenkins slave  then you need to set the url of the host to the one it s actually using    On the host  go to Manage Jenkins   Configure System and edit  Jenkins URL

User · Answer

I ve changed the java proxy settings to direct connection - and it works

[java] Java web start - Unable to load resource

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