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Category: Notes

Notes/Technology

Fix : Ubuntu Boot error – Boot device not found (after partitioning)

Posted on April 26, 2012 by Kj / 0 Comment

Problem: Ubuntu gives the message “Boot device not found” after partitioning using Gparted (done from a usb instance). Reason : Unknown. Could be th...

Notes/Technology

Hibernate calls hang after giving message “opening JDBC connection”

Posted on December 26, 2011 by Kj / 0 Comment

Bug: Hibernate calls hang after giving the message “opening JDBC connection” in the logs. No exception/error message is thrown. Reason: Connection t...

Notes/Technology

Hibernate Gives Connection Pool Error: Timeout waiting for idle object

Posted on December 26, 2011 by Kj / 0 Comment

Bug: Hibernate connection times out (after the maxWait duration set for the datasource), and gives error message in the log – “Timeout waiting for i...

Notes/Technology

ClassCastException for same class on slim3 for Google App Engine

Posted on July 10, 2011 by Kj / 0 Comment

Bug: A class cast exception like the following is thrown – class x.y.z.MyClass cannot be cast to class x.y.z.MyClass Reason: The class loaders for both th...

Notes

jqGrid cell data disappears on clicking other cells

Posted on June 1, 2011 by Kj / 0 Comment

Bug: jqGrid cell data in a previously edited cell disappears on editing other rows. This usually occurs after a cell or row value is edited programmatically. Re...

Notes

Solution to Hibernate error: Unknown column ‘******’ in ‘order clause’

Posted on December 27, 2010 by Kj / 0 Comment

Bug: A above exception thrown when using hibernate. Reason: This error occurs usually because of a misplaced “order by” clause. If in a many to many...

Notes

Solution to MySQLSyntaxErrorException: Unknown column ‘xxxxx_.elt’ in ‘field list’

Posted on December 27, 2010 by Kj / 0 Comment

Bug: The above exception thrown when using hibernate. Reason: This usually occurs when column name is not mentioned in many-to-many node. The correct mapping fo...

Notes

Error: attribute property is mandatory for tag authentication

Posted on December 12, 2010 by Kj / 0 Comment

Bug: The exception thrown when migrating to spring 3. Reason:  This exception thrown when migrating to spring-security 3 occurs due to spring 3 (authentication ...

Notes/Technology

Solve MySQL ERROR 1005: Can’t create table (errno: 150)

Posted on December 9, 2010 by Kj / 0 Comment

Bug: Above error occurs when rebuilding a database from the SQL script. Reason: This error usually occurs when the table being created cannot fulfill a foreign ...

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