[GitHub] flink issue #3525: [FLINK-6020]add a random integer suffix to blob key to av...

[netguy204 <gi...@git.apache.org>]

Github user netguy204 commented on the issue:

    https://github.com/apache/flink/pull/3525
  
    +1 I'm looking forward to this fix as I think I'm encountering this bug in production.
    
    I bundle my jobs into a single JAR file with multiple mains. I submit the jobs to the cluster sequentially (once the cluster accepts one I submit the next). My job also has two dependency JARs that I provide via HTTP using the -C switch to flink.
    
    When a job fails it automatically restarts but it seems to cause other jobs from the same JAR to fail and restart as well. The error is always some variation of:
    
    ```
    java.lang.IllegalStateException: zip file closed
    	at java.util.zip.ZipFile.ensureOpen(ZipFile.java:669)
    	at java.util.zip.ZipFile.getEntry(ZipFile.java:309)
    	at java.util.jar.JarFile.getEntry(JarFile.java:240)
    	at sun.net.www.protocol.jar.URLJarFile.getEntry(URLJarFile.java:128)
    	at java.util.jar.JarFile.getJarEntry(JarFile.java:223)
    	at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:1005)
    	at sun.misc.URLClassPath$JarLoader.findResource(URLClassPath.java:983)
    	at sun.misc.URLClassPath.findResource(URLClassPath.java:188)
    	at java.net.URLClassLoader$2.run(URLClassLoader.java:569)
    	at java.net.URLClassLoader$2.run(URLClassLoader.java:567)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.net.URLClassLoader.findResource(URLClassLoader.java:566)
    	at java.lang.ClassLoader.getResource(ClassLoader.java:1093)
    	at java.net.URLClassLoader.getResourceAsStream(URLClassLoader.java:232)
            .... backtrace from some arbitrary point in my code that never is doing anything with reflection ...
    ```
    
    The class load that triggers the fault is arbitrary. The same job may fail and restart multiple times in the same day with a different failing class load.


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