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https://issues.apache.org/jira/browse/DERBY-5317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13761798#comment-13761798
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Dyre Tjeldvoll commented on DERBY-5317:
---------------------------------------
I think it is possible (but ugly) to avoid the NPE by checking if the output
stream is null, and then just rethrow the IOException from the Reader. When
doing that you're left with the "Bad codepoint" error thrown by the server when
encountering a PRPSQLSTT cp when reading the EXTDTA objects in the prepare
message. That is better than getting an NPE, but it is still difficult to
identify the cause of the problem (calling setClob() with a Reader that is a
really an UpdateSensitiveClobLocatorReader() tied to the same agent as the ps).
I think a reasonable first step would be to throw (some form of)
UnsupportedException when attempting to use setX() with a Locator-backed
Reader/Stream value. If the user is willing to incur the overhead of
materializing the object in the client, they can always force that by reading
the lob into a buffer and use setX with a Reader/Stream referencing that buffer.
To make this efficient I guess we need to identify Locator-backed
Readers/streams and somehow bind the locator value in place of the
Reader/Stream, and only convert the locator value into the actual Reader/Stream
value when required on the server. Don't know if that is feasible...
> NullPointerException in org.apache.derby.client.net.Request.sendBytes()
> with client
> -------------------------------------------------------------------------------------
>
> Key: DERBY-5317
> URL: https://issues.apache.org/jira/browse/DERBY-5317
> Project: Derby
> Issue Type: Bug
> Components: Network Client
> Affects Versions: 10.9.1.0
> Reporter: Kathey Marsden
> Labels: derby_triage10_11
> Attachments: Repro5317.java, Repro5317.java, traces_10_2and10_9.zip
>
>
> Investigating DERBY-5308, I found that the LobLimits.java test run with
> client fails with a NullPointerException.
>
> END setup
> ========================================
> START ClobTest #1 -insertClob of size = 2147483647
> Rows inserted with clob of size (2147483647) = 2
> ========================================
> ========================================
> START ClobTest #2 - SELECT CLOB of size = 2147483647
> Matched rows selected with clob of size(2147483647) =1
> ========================================
> ========================================
> START ClobTest #3 - SELECT CLOB of size = 2147483647
> Matched rows selected with clob of size(2147483647) =1
> ========================================
> ========================================
> START ClobTest #4 - select and then update clob of size= 2147483647 - Uses
> setClob api
> FAIL -- Unexpected exception:
> java.lang.NullPointerException
> at org.apache.derby.client.net.Request.sendBytes(Unknown Source)
> at
> org.apache.derby.client.net.Request.flushScalarStreamSegment(Unknown Source)
> at
> org.apache.derby.client.net.Request.padScalarStreamForError(Unknown Source)
> at org.apache.derby.client.net.Request.writePlainScalarStream(Unknown
> Source)
> at org.apache.derby.client.net.Request.writeScalarStream(Unknown
> Source)
> at org.apache.derby.client.net.Request.writeScalarStream(Unknown
> Source)
> at
> org.apache.derby.client.net.NetStatementRequest.buildEXTDTA(Unknown Source)
> at
> org.apache.derby.client.net.NetStatementRequest.writeExecute(Unknown Source)
> at
> org.apache.derby.client.net.NetPreparedStatement.writeExecute_(Unknown Source)
> at org.apache.derby.client.am.PreparedStatement.writeExecute(Unknown
> Source)
> at org.apache.derby.client.am.PreparedStatement.flowExecute(Unknown
> Source)
> at
> org.apache.derby.client.am.PreparedStatement.executeUpdateX(Unknown Source)
> at org.apache.derby.client.am.PreparedStatement.executeUpdate(Unknown
> Source)
> at
> org.apache.derbyTesting.functionTests.tests.largedata.LobLimits.selectUpdateClob(LobLimits.java:115
> 7)
> at
> org.apache.derbyTesting.functionTests.tests.largedata.LobLimits.clobTests(LobLimits.java:313)
> at
> org.apache.derbyTesting.functionTests.tests.largedata.LobLimits.runTests(LobLimits.java:177)
> at
> org.apache.derbyTesting.functionTests.tests.largedata.LobLimits.main(LobLimits.java:151)
> ========================================
> START ClobTest #12.1 -insertClob of size = 104857600
> NEGATIVE TEST - Expected Exception:
> EXPECTED SQL Exception: (08003) No current connection.
> ========================================
> START ClobTest #12.2 - SELECT CLOB of size = 104857600
> FAIL -- Unexpected exception:
> java.sql.SQLNonTransientConnectionException: No current connection.
> at
> org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown
> Source)
> at org.apache.derby.client.am.SqlException.getSQLException(Unknown
> Source)
> at org.apache.derby.client.am.PreparedStatement.setInt(Unknown Source)
> at
> org.apache.derbyTesting.functionTests.tests.largedata.LobLimits.selectClob(LobLimits.java:1007)
> In the derby.log I see
> derby.system.home=/local0/kmarsden/repro/largeData/testtrunkdnc/DerbyNetClient/LobLimits
> Database Class Loader started - derby.database.classpath=''
> Tue Jul 05 17:50:01 PDT 2011 Thread[DRDAConnThread_11,5,main] (DATABASE =
> wombat), (DRDAID = .-580681567053183
> 269{2}), Execution failed because of a Distributed Protocol Error:
> DRDA_Proto_SYNTAXRM; CODPNT arg = 200d; E
> rror Code Value = 1d. Plaintext connection attempt from an SSL enabled client?
> Tue Jul 05 17:50:01 PDT 2011 : Execution failed because of a Distributed
> Protocol Error: DRDA_Proto_SYNTAXRM;
> CODPNT arg = 200d; Error Code Value = 1d. Plaintext connection attempt from
> an SSL enabled client?
> org.apache.derby.impl.drda.DRDAProtocolException: Execution failed because of
> a Distributed Protocol Error: D
> RDA_Proto_SYNTAXRM; CODPNT arg = 200d; Error Code Value = 1d. Plaintext
> connection attempt from an SSL enable
> d client?
> at org.apache.derby.impl.drda.DRDAConnThread.throwSyntaxrm(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.invalidCodePoint(Unknown
> Source)
> at
> org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLSTTobjects(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLSTT(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
> Tue Jul 05 17:50:01 PDT 2011 Thread[DRDAConnThread_11,5,main] (DATABASE =
> wombat), (DRDAID = .-580681567053183
> 269{2}), Execution failed because of a Distributed Protocol Error:
> DRDA_Proto_SYNTAXRM; CODPNT arg = 200d; E
> rror Code Value = 1d. Plaintext connection attempt from an SSL enabled client?
> Tue Jul 05 17:50:01 PDT 2011 : Execution failed because of a Distributed
> Protocol Error: DRDA_Proto_SYNTAXRM;
> CODPNT arg = 200d; Error Code Value = 1d. Plaintext connection attempt from
> an SSL enabled client?
> org.apache.derby.impl.drda.DRDAProtocolException: Execution failed because of
> a Distributed Protocol Error: D
> RDA_Proto_SYNTAXRM; CODPNT arg = 200d; Error Code Value = 1d. Plaintext
> connection attempt from an SSL enable
> d client?
> at org.apache.derby.impl.drda.DRDAConnThread.throwSyntaxrm(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.invalidCodePoint(Unknown
> Source)
> at
> org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLSTTobjects(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.parseEXCSQLSTT(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown
> Source)
> at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
> ----------------------------------------------------------------
> Tue Jul 05 17:50:07 PDT 2011: Shutting down Derby engine
> ----------------------------------------------------------------
> Tue Jul 05 17:50:07 PDT 2011:
> To run the test, you have to remove largeData from DerbyNetClient.exclude and
> run
> java -Dframework=DerbyNetClient
> org.apache.derbyTesting.functionTests.harness.RunTest
> org.apache.derbyTesting.functionTests.tests.lageData.LobLimits.
> It took about 3.5 hours to occur.
> I will work on a smaller reproduction.
>
> 5,9 36%
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