Technical FAQ: Index

We have broken up our list of frequently asked questions into multiple pages under the subject headings listed below. All of the questions are indexed from the current page. Some questions may be indexed under more than one subject heading. You can also use the search box below to search through all the FAQs for specific information.

General questions

Questions about installation

Questions about code examples

General questions about Java

WebLogic Server-related questions

Questions about WebLogic EJB

Questions about WebLogic and server-side Java

Questions about WebLogic Events

Questions about WebLogic security

Questions about dbKona

Questions about WebLogic JDBC and applets

General questions about jdbcKona

Questions about jdbcKona/Informix

Questions about jdbcKona/Oracle

Questions about jdbcKona/Sybase

Questions about jdbcKona/MSSQLServer

Questions about jdbcKona and DBMS versions

Questions about WebLogic products and other software

General questions

• Using JDK 1.1.6 with Win32
• What about the recent SSL-related security bulletin?
• You do not support 1.0.2 anymore?
• What do you mean by a "logfile"?
• Will using a JIT make my Java application run faster?
• What do you mean by "two-tier" and "multitier" drivers?
• I'm having trouble with Java -- What do I do?

Questions about installation

• What's a service pack and how do I use it?
• Problems with WebLogic XML licenses
• Setting your CLASSPATH
• Help! Some of the WebLogic classes are missing from the distribution!
• Why am I getting a License Exception?
• How do I transfer my permanent license to another IP address?
• I get an error message after compiling the license file
• I get a LicenseException when I run utils.dbping on Solaris
• How can I debug a problem in connecting to the database?

Questions about code examples

• Why can't I get an example class file to work?
• How do I use the Cloudscape evaluation version with the examples?

General questions about Java

• StackOverflowException
• Problems reading jar files with ZipFile

WebLogic Server-related questions

• Problem setting time zone to China Taiwan Time (CTT)
• Using SOCKS with WebLogic
• Can I speed up connection requests?
• Does WebLogic use CORBA? Is it an ORB?
• Which WebLogic classes do I need to jar up for my client app?
• Speeding up HTTP tunneling
• Using Netscape security certificates with WebLogic
• How do I start WebLogic automatically when UNIX reboots?
• Servlet performance seem a bit sluggish on your NT machine?
• "NoClassDefFound" error on Solaris?
• "Too many open files" error on Solaris?
• I can't get the WebLogic Server to start
• Problems with the WebLogic Server running out of memory
• Running WebLogic with Microsoft SDK For Java
• Problems running WebLogic under Symantec?
• The WebLogic Console is reporting incorrect hostname and IP address

Questions about WebLogic EJB

• SQL Exception and JDBC JTS driver
• Using EJBeans with the JDBC-ODBC bridge and Microsoft Access
• Speeding up compilation of EJBeans
• EJBC compiler and the manifest file
• Custom finder methods for container-managed beans
• Rollback exceptions with EJB applications
• Handling exceptions with WebLogic EJB from a Visual Basic client
• Using a database for EJB bean-managed persistence
• Bugs in Microsoft SDK For Java that affect EJB users
• EJB compatibility
• WebLogic EJB and CORBA
• Exceptions loading EJBeans under Microsoft SDK For Java
• Polymorphic responses from create() and find() methods
• Using ejbActivate() and ejbPassivate()
• Referencing an EJBean from within an EJBean
• Why are re-entrant EJBeans dangerous?
• EJB transactions and multiple databases
• Using a database for transactions with entity beans
• Using TX_SUPPORTS
• Container-managed persistence for non-primitive attributes
• Object-relational mapping tools
• Date datatypes with JDBC container-managed persistence
• JTS and connection pools
• Using findByPrimaryKey()
• Matching the primary key class and database data types
• Using primary keys and container-managed persistence

Questions about WebLogic and server-side Java

• Using Java servlets with various webservers
• Can I use WebLogic's database drivers with Netscape servers?
• How do you call a servlet with parameters in the URL?
• Can't connect to database with the Java WebServer

Questions about WebLogic Events

• Should every thread I'm using make a client connection to WebLogic?

Questions about WebLogic security

• Expired sample security certificates
• Using RSA encryption
• SSL and certificates
• Using non-RSA style certificates

Questions about dbKona

• What about JDBC and dbKona?
• Does dbKona use vendor-specific shared libraries to communicate with a remote DBMS?
• Is there any performance hit from using dbKona?
• Problems saving a TableDataSet
• What happens to a TableDataSet when I save changes?
• Sometimes I get a license exception with dbKona
• Why does getTableName() return an empty string?

Questions about WebLogic JDBC and applets

• Errors running t3dbping
• What's the difference between a Java and a "Java-only" JDBC driver?
• Can I use a two-tier driver for a browser applet?
• Incompatibilities between Java VMs and the JDBC spec for driver registration
• Why do I get a "No suitable driver" message using IE3.01?
• Just can't get my browser applet to work!
• Why will not my browser applet connect to the database?
• My applet works with Appletviewer, but not with a browser . . . ?
• Why do I get a Netscape security violation when running an example applet?
• What's causing ClassFormatErrors with my applet?

General questions about jdbcKona

• Using the jdbcKona drivers on IRIX
• How can I tell if the database is unavailable?
• What's a "native" JDBC driver?
• What do I need to connect to a database with JDBC and Java?
• How do I connect to a DBMS with jdbcKona?
• Why can't my class find the WebLogic driver?
• Locating the shared library for HPUX green threads
• Why am I getting an access violation in Netscape?
• Incompatibilities between Java VMs and the JDBC spec for driver registration
• UnsatisfiedLinkError while testing my two-tier connection . . .
• Unable to connect to my database! UnknownHost Exception . . .
• How can I find out how many rows are returned after I execute a query?
• Can I interleave queries on a single connection?
• Why do I get the error "No weblogicoci24 in shared path" using the jdbcKona driver?

Questions about jdbcKona/Informix

• Using multibyte character sets with jdbcKona/Informix4
• Using jdbcKona/Informix4 in an applet
• Setting locks in an Informix database

Questions about jdbcKona/Oracle

• Unsatisfied link error
• Error using FOR UPDATE statement with Oracle 8
• OCIW32.DLL error
• Support for transaction isolation levels
• Running Oracle under HP-UX 10.x
• Running Oracle under HP-UX 11.x
• Using multibyte character sets with jdbcKona/Oracle.
• Using large objects with Oracle and Sybase
• Do you support Oracle 8?
• What version of Oracle client/server does jdbcKona/Oracle require?
• Hanging problem with Oracle 7.3.3 and jdbcKona/Oracle on Windows NT
• Does jdbcKona/Oracle work with IBM's VisualAge for Java?
• Does jdbcKona/Oracle work with Oracle 7.3?
• How do I use OS authentication with jdbcKona/Oracle and WebLogic JDBC connection pools?
• What type of Object is returned by ResultSet.getObject()?
• Can I use SQL*Net V1 with jdbcKona/Oracle?
• Personal Oracle and Windows95
• How do I limit the number of Oracle database connections?
• Why am I running out of allocated processes in Oracle?
• I'm getting back integers instead of doubles from an Oracle number column
• How can I call Oracle stored procedures without parameters?
• How do I bind String values in a PreparedStatement?
• Using 8-bit character sets with Oracle/Solaris
• Using Oracle JDBC drivers with a non-English codeset
• How do I know what codesets I have available in Oracle?
• What do I do with an "ORA" SQLException?
• What does the error "ORA-6502" mean?
• Why would I get an error while trying to retrieve the text for ORA-12705?
• Why am I getting an error when using Class.forName() with AIX JDK 1.1.2?
• When I update my database using Oracle database link I run out of resources
• Connection failures using Oracle and the 8859-9 codeset.

Questions about jdbcKona/Sybase

• Problems with jdbcKona/Sybase on UNIX using native threads
• Character set incompatibilities when using Solaris Sybase server
• Does jdbcKona/Sybase work with Sybase SQL Server 4.9x?
• Why am I getting an Exception when I use getTimestamp()?
• Why is the "time" part of the date missing?
• Can I turn off autocommit in my jdbcKona/Sybase application?
• Problems inserting data with jdbcKona/Sybase
• How do I get primary key information from a Sybase table?
• How does jdbcKona/Sybase handle trailing spaces?
• Why am I getting an error using jdbcKona/Sybase with HPUX?

Questions about jdbcKona/MSSQLServer

• Differences in WebLogic's and Microsoft's JDBC driver
• What's this "No Data Available" exception?
• Does jdbcKona/MSSQLServer support version 6.5 of MS SQL Server?
• I can't get my JetConnect/ODBC code to work with jdbcKona/MSSQLServer version 2.4
• How can I access a Microsoft SQL Server database from Solaris or Macintosh?
• SQLExceptions with jdbcKona/MSSQLServer
• Are there restrictions on selecting SQL Server text and image data?
• Is there a length limit on retrieving SQL Server text fields?

Questions about jdbcKona and DBMS versions

• Using jdbcKona with Oracle 7.x client libraries and Oracle 8
• Hanging problem with Oracle 7.3.3 and jdbcKona/Oracle on Windows NT
• Does the WebLogic jdbcKona/Oracle driver work with IBM VisualAge for Java?
• Does jdbcKona/Oracle work with Oracle 7.3?
• Can I use SQL*Net V1 with the newer jdbcKona drivers?
• Does jdbcKona/Sybase work with Sybase SQL Server 4.9x?
• Does jdbcKona/MSSQLServer support version 6.5 of MS SQL Server?
• Personal Oracle and Windows95

Questions about WebLogic products and other software

• Compiling EJB and RMI classes with Symantec Cafe 3.0
• WebLogic Server runs slowly under VisualAge
• Using Macromedia Generator with the WebLogic Server
• Problems loading shared libraries on HP-UX
• Using the Apache HTTP Server to proxy requests to WebLogic
• Handling exceptions with WebLogic EJB from a Visual Basic client
• Running WebLogic under Windows 95
• Using the jdbcKona drivers on IRIX
• Problems running WebLogic on Tandem
• Using JDK 1.1.6 with Win32
• Bugs in Microsoft SDK For Java that affect EJB users
• Using Java servlets with various webservers
• Netscape Communicator 4.01 Security Exception
• Why am I getting an access violation in Netscape?
• Problems loading classes using Marimba Castanet tuner 2.0.
• How do I use the jdbcKona two-tier drivers with Symantec Cafe?
• Running WebLogic with Microsoft SDK For Java
• Problems running the WebLogic Server under Symantec?
• Locating the shared library for HPUX green threads
• I can't get my JetConnect/ODBC code to work with jdbcKona/MSSQLServer version 2.4
• NoClassDefFoundError when downloading an applet

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Last updated 08/04/1999