Re: [I] [Bug]Pulsar 3.0.5 Topic service unavailable due to broken ledger in __change_events system topic [pulsar]

["fretory (via GitHub)" <gi...@apache.org>]

fretory commented on issue #24436:
URL: https://github.com/apache/pulsar/issues/24436#issuecomment-3190777196

   > [Pulsar 3.0.13 release](https://pulsar.apache.org/release-notes/versioned/pulsar-3.0.13/) and [Pulsar 4.0.6 release](https://pulsar.apache.org/release-notes/versioned/pulsar-4.0.6/) are now available with [BookKeeper 4.16.7 and 4.17.2](https://bookkeeper.apache.org/release-notes/) which includes a fix [apache/bookkeeper#4607](https://github.com/apache/bookkeeper/pull/4607).
   
   Thanks for the update. I have some reservations about this being the root cause. I've been running the test code from that issue continuously for the past four days and haven't been able to reproduce the problem once.
   
   I doubt this would corrupt the data and cause it to be subsequently cleaned up by the BookKeeper garbage collection thread.
   
   ```
       // you 
       @org.junit.jupiter.api.Test 
       public void test() throws InterruptedException {
           byte[] bytes = new byte[1024];
           while (true) {
               var buf = Unpooled.buffer(1024);
               buf.writerIndex(1024);
               if (ByteBufUtil.compare(buf, Unpooled.wrappedBuffer(bytes)) != 0) {
                   System.out.println(ByteBufUtil.hexDump(buf));
               }
           }
       }
   ```
   
   Nevertheless, I will upgrade to the new version and test it. I'll report back on the results.


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