问题
I've just updated my java version to 1.8.0u92 and now my little java webstart application (fully signed from https) starts up really slowly (over 4 minutes).
I enabled tracing in my webstart and see that webstart tries to download every single class file from my server:
security: Istrusted: http://example.com/deploy/w/w.jnlp true
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@111b04e: 3
cache: registerReference: com.sun.deploy.cache.MemoryCache$CachedResourceReference@111b04e: 4
network: Cache entry not found [url: http://example.com/deploy/w/org/apache/log4j/Category.class, version: null]
network: Connecting http://example.com/deploy/w/org/apache/log4j/Category.class with proxy=DIRECT
network: Connecting socket://example.com:80 with proxy=DIRECT
network: Cache entry not found [url: http://example.com/deploy/w/org/apache/log4j/Category.class, version: null]
network: Connecting http://example.com/deploy/w/org/apache/log4j/Category.class with proxy=DIRECT
network: Connecting socket://example.com:80 with proxy=DIRECT
network: Cache entry not found [url: http://example.com/deploy/w/org/apache/log4j/spi/AppenderAttachable.class, version: null]
network: Connecting http://example.com/deploy/w/org/apache/log4j/spi/AppenderAttachable.class with proxy=DIRECT
network: Connecting socket://example.com:80 with proxy=DIRECT
network: Cache entry not found [url: http://example.com/deploy/w/org/apache/log4j/spi/AppenderAttachable.class, version: null]
network: Connecting http://example.com/deploy/w/org/apache/log4j/spi/AppenderAttachable.class with proxy=DIRECT
network: Connecting socket://example.com:80 with proxy=DIRECT
...
A simple test case I created works fine, webstart only downloads the jar and starts up fine and fast.
When i downgrade to 1.8.0u77 everything works again.
I of course cleaned all caches.
This problem seems to be related to something that changed in 1.8.0u91 or 1.8.0u92. I looked through the bug fixes but couldn't find much.
Anyone got a bright idea?
Update I've added a jar dependency to my test case
<jar href="mainapp_lib/log4j-1.2.17.jar" />
and now my webstart starts to download every single class file from that dependency from the server. Which results in many 404's at serverside, cause only the jar is available.
来源：https://stackoverflow.com/questions/36840762/webstarts-downloads-classes-directly-from-server-in-1-8-0u9x