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Posted to notifications@netbeans.apache.org by "mbien (via GitHub)" <gi...@apache.org> on 2026/04/02 06:00:21 UTC

Re: [PR] Improve startup cache loading performance [netbeans]

mbien commented on PR #9307:
URL: https://github.com/apache/netbeans/pull/9307#issuecomment-4174868675

   tested a few failure modes. e.g using a corrupted cache or one from an older NB version and it got reset on start.
   
   <details>
   
   e.g cache containing invalid data would show:
   
   ```
   INFO [org.netbeans.core.startup.ModuleList]: Cannot read cache
   java.io.UTFDataFormatException: malformed input around byte 6
   	at java.base/java.io.DataInputStream.readUTF(DataInputStream.java:641)
   	at java.base/java.io.DataInputStream.readUTF(DataInputStream.java:550)
   	at org.netbeans.core.startup.ModuleList.readProps(ModuleList.java:652)
   [catch] at org.netbeans.core.startup.ModuleList.readCache(ModuleList.java:626)
   	at org.netbeans.core.startup.ModuleList$ReadInitial.run(ModuleList.java:1583)
   	at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:102)
   	at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:494)
   	at org.netbeans.core.startup.ModuleList.readInitial(ModuleList.java:147)
   	at org.netbeans.core.startup.ModuleSystem.readList(ModuleSystem.java:280)
   	at org.netbeans.core.startup.Main.getModuleSystem(Main.java:171)
   	at org.netbeans.core.startup.Main.getModuleSystem(Main.java:141)
   	at org.netbeans.core.startup.Main.start(Main.java:307)
   	at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:99)
   	at java.base/java.lang.Thread.run(Thread.java:1583)
   ```
   
   but there are various checks before that so it would fail silently in most cases without even getting to the point where it is loaded.
   
   </details>


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