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From "Tomohito Nakayama (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1513) Trial 1 for DERBY-550
Date Sat, 15 Jul 2006 07:25:14 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1513?page=comments#action_12421291 ] 
            
Tomohito Nakayama commented on DERBY-1513:
------------------------------------------

With DERBY-1513_2.patch, MemorySavedByteArrayOutputStream did not work as before.

Using jdb, I found size of buf and count is not same value when toByteArray method was called.

Exception occurred: java.lang.OutOfMemoryError (uncaught)
Exception occurred: java.lang.OutOfMemoryError (uncaught)"thread=DRDAConnThread_3", java.io.ByteArrayOutputStream.toByteArray(),
line=136 bci=4

DRDAConnThread_3[1] where
  [1] java.io.ByteArrayOutputStream.toByteArray (ByteArrayOutputStream.java:136)
  [2] org.apache.derby.impl.drda.DDMReader$MemorySavedByteArrayOutputStream.toByteArray (DDMReader.java:1,816)
  [3] org.apache.derby.impl.drda.DDMReader.getExtData (DDMReader.java:1,004)
  [4] org.apache.derby.impl.drda.DDMReader.getExtData (DDMReader.java:944)
  [5] org.apache.derby.impl.drda.DRDAConnThread.readAndSetExtParam (DRDAConnThread.java:4,355)
  [6] org.apache.derby.impl.drda.DRDAConnThread.readAndSetAllExtParams (DRDAConnThread.java:4,320)
  [7] org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLSTTobjects (DRDAConnThread.java:3,811)
  [8] org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLSTT (DRDAConnThread.java:3,640)
  [9] org.apache.derby.impl.drda.DRDAConnThread.processCommands (DRDAConnThread.java:928)
  [10] org.apache.derby.impl.drda.DRDAConnThread.run (DRDAConnThread.java:254)
DRDAConnThread_3[1] up
DRDAConnThread_3[2] list
1,812    			if(buf.length == count){
1,813    				return buf;
1,814    				
1,815    			}else{
1,816 => 				return super.toByteArray();
1,817    
1,818    			}
1,819    		}
1,820    		
1,821    		
DRDAConnThread_3[2] eval count
 count = 67108864
DRDAConnThread_3[2] eval buf.length
 buf.length = 67108865
DRDAConnThread_3[2] 

This difference is mysterious ....

> Trial 1 for DERBY-550
> ---------------------
>
>                 Key: DERBY-1513
>                 URL: http://issues.apache.org/jira/browse/DERBY-1513
>             Project: Derby
>          Issue Type: Sub-task
>            Reporter: Tomohito Nakayama
>         Assigned To: Tomohito Nakayama
>         Attachments: DERBY-1513.patch, DERBY-1513_2.patch, serverMemoryUsage.xls
>
>
> http://issues.apache.org/jira/browse/DERBY-550#action_12421280
> http://issues.apache.org/jira/browse/DERBY-550#action_12421282

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