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Mike Matrigali edited comment on DERBY-6785 at 12/19/14 5:14 AM: ----------------------------------------------------------------- I agree with rick, derby explicitly does not support direct access to the COLUMNDATATYPE. Derby provides jdbc standard interfaces to look at metadata. While it may have worked in the past this was an accident. Some day derby may want to change the class that implements COLUMNDATATYPE internally and then it would not work at all for an old client to access a new database as it would not have a class that understood the new type. But using the jdbc metadata standards would work. It was necessary to change the java version used to compile derby in 10.11 as the community voted to allow that release to use new java language features that required using a newer java version to build derby. Do post if you have any other examples of the marshaling error that do not involve directly querying derby private system catalog data. Your initial report mentioned problems with alter table and creating indexes. My guess is that if you are seeing that problem with your tool doing those operations, it may indicate that the tool is again incorrectly querying the private system catalog data. was (Author: mikem): I agree with rick, derby explicitly does not support direct access to the COLUMNDATATYPE. Derby provides jdbc standard interfaces to look at metadata. While it may have worked in the past this was an accident. Some day derby may want to change class that implements COLUMNDATATYPE internally and then it would not work at all for an old client to access a new database as it would not have a class that understood the new type. Do post if you have any other examples of the marshaling error that do not involve directly querying derby private system catalog data. Your initial report mentioned problems with alter table and creating indexes. My guess is that if you are seeing that problem with your tool doing those operations, it may indicate that the tool is again incorrectly querying the private system catalog data. > Latest JDBC driver from 10.11.1.1 gives exception when trying to connect to > 10.10.2.0 > ------------------------------------------------------------------------------------- > > Key: DERBY-6785 > URL: https://issues.apache.org/jira/browse/DERBY-6785 > Project: Derby > Issue Type: Bug > Components: JDBC > Affects Versions: 10.10.2.0 > Environment: Win 7, Win 8, Mac OSX and Ubuntu 14.04 > Reporter: tariq rahiman > Fix For: 10.11.1.3 > > Attachments: DERBY-6785.sql, Screen Shot 2014-12-18 at 5.13.15 > PM.png, Screen Shot 2014-12-18 at 5.13.58 PM.png, derby.log, log.zip > > > I have downloaded 10.11.1.1 and 10.10.2.0 from Apache Derby download and > installed them in 2 separate machines. > I have a GUI client that connects to the toursdb database of both versions > using a JDBC connection that makes uses of derby.jar, derbyclient.jar and > derbynet.jar > I use the latest JDBC drivers from 10.11.1.1 to connect to both the database > versions. The drivers I make use of are derby.jar, derbyclient.jar and > derbynet.jar > Connection to 10.10.2.0 is successful, but when I try to Alter/Drop Tables > and Views, Create an Index or try to retrieve column information of tables, i > get the below exception: > The classpath settings for the two environments are identical and If i > replace the derby.jar, derbyclient.jar and derbynet.jar of the latest release > with the 10.10.2.0 ones, it works fine with 10.10.2.0. > So my question is backward compatibility of the latest Apache Derby JDBC > drivers. Can I use 10.11.1.1 jars to connect to 10.10.2.0 ? > Exception: > java.sql.SQLException: Error marshalling or unmarshalling a user defined > type: org.apache.derby.catalog.types.TypeDescriptorImpl; local class > incompatible: stream classdesc serialVersionUID = -5485274209578709396, local > class serialVersionUID = -3812847726962874375 > at > org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source) > at org.apache.derby.client.am.SqlException.getSQLException(Unknown > Source) > at org.apache.derby.client.am.ClientResultSet.getString(Unknown Source) > at \\...\\ .\\हिñçêČάй語简�?한\\.cꋦᚹ⣞ꊼ 8.a(Unknown Source) > at com.common.ui.tree.eꏷꃒꆶᡰ.a(Unknown Source) > at com.common.ui.tree.eꏷꃒꆶᡰ.wR(Unknown Source) > at com.common.ui.tree.eꏷꃒꆶᡰ$1.process(Unknown Source) > at com.common.ui.util.BackgroundThread.run(Unknown Source) > Caused by: ERROR XN020: Error marshalling or unmarshalling a user defined > type: org.apache.derby.catalog.types.TypeDescriptorImpl; local class > incompatible: stream classdesc serialVersionUID = -5485274209578709396, local > class serialVersionUID = -3812847726962874375 > at org.apache.derby.client.am.Cursor.get_UDT(Unknown Source) > at org.apache.derby.client.am.Cursor.getString(Unknown Source) > ... 6 more > Caused by: java.io.InvalidClassException: > org.apache.derby.catalog.types.TypeDescriptorImpl; local class incompatible: > stream classdesc serialVersionUID = -5485274209578709396, local class > serialVersionUID = -3812847726962874375 > at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:617) > at > java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1622) > at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517) > at > java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) > at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) > at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) > ... 8 more > Let me know if you need any more information -- This message was sent by Atlassian JIRA (v6.3.4#6332)