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Problem(Abstract) |
IBM® WebSphere® Application Server V6.1.0.11, 32-bit
edition, for Linux® platforms is supported on systems using a 64-bit
kernel when using x86-64 (Intel® EM64T / AMD Opteron) hardware
architecture.
However, earlier versions of the 32-bit edition product (including all
V5.1 and 32-bit V6.0 versions) are not supported on a 64-bit kernel on
that hardware architecture. WebSphere Application Server 32-bit editions
of earlier versions must be installed on a 32-bit kernel on that hardware
architecture. |
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Cause |
WebSphere Application Server 32-bit edition for Linux
platforms is based on a 32-bit version of the Java™ SDK. Prior to
V6.1.0.11, WebSphere Application Server 32-bit edition was not certified
for use on 64-bit kernels running on Linux systems booted with a 64-bit
kernel on x86-64 based hardware architecture. The "x86-64 architecture"
represents processor architectures including Intel EM64T (utilized by
Intel Xeon processors), and also AMD64 (utilized by AMD Opteron
processors).
Therefore, WebSphere Application Server 32-bit edition is not supported
when running on a Linux 64-bit kernel on x86-64 based hardware
architecture prior to version 6.1.0.11. In order for the 32-bit edition to
be supported on Linux using on x86-64 based hardware, it is either
necessary to boot the operating system using a 32-bit kernel, or upgrade
the product to version 6.1.0.11 and boot the operating system with either
a 32-bit kernel or a 64-bit kernel.
Concerning WebSphere Application Server V5.0 and V5.1
WebSphere Application Server V5.0 and V5.1 are based on 32-bit Java™
SDKs, and therefore neither V5.0 nor V5.1 are supported on 64-bit Linux
kernels using x86-64 based hardware architecture.
Concerning WebSphere Application Server V6.0
WebSphere Application Server V6.0 products available in 32-bit and 64-bit
editions. The 32-bit editions of WebSphere Application Server V6.0 are not
supported for use with 64-bit Linux kernels using x86-64 based hardware
architecture. Instead of installing the 32-bit edition of WebSphere
Application Server V6.0 in such an environment, install the 64-bit
edition, or boot the operating system with a 32-bit kernel.
Concerning WebSphere Application Server V6.1
WebSphere Application Server V6.1 products available in 32-bit and 64-bit
editions. The 32-bit edition of the product, prior to V6.1.0.11, is not
supported for use on Linux booted with a 64-bit kernel on x86-64 hardware
architecture. Upgrading the 32-bit product to V6.1.0.11 will bring the
product to a supported level.
The following table indicates whether various product versions are
supported on particular kernel levels. This table applies to WebSphere
Application Server Express Edition, Base Edition, and Network Deployment
Edition.
Product Version |
Product Edition |
Linux Kernel |
Hardware |
Is it supported? |
V5.1
(all versions) |
32-bit |
32-bit |
x86-64: Intel EM64T and AMD64 |
Supported |
V5.1
(all versions) |
32-bit |
64-bit |
x86-64: Intel EM64T and AMD64 |
Not supported |
V6.0
(all versions) |
32-bit |
32-bit |
x86-64: Intel EM64T and AMD64 |
Supported |
V6.0
(all versions) |
32-bit |
64-bit |
x86-64: Intel EM64T and AMD64 |
Not supported |
V6.0
(all versions) |
64-bit |
64-bit |
x86-64: Intel EM64T and AMD64 |
Supported |
V6.1
(all versions) |
32-bit |
32-bit |
x86-64: Intel EM64T and AMD64 |
Supported |
V6.1.0.0, V6.1.0.1, V6.1.0.3, V6.1.0.5,
V6.1.0.7, V6.1.0.9 |
32-bit |
64-bit |
x86-64: Intel EM64T and AMD64 |
Not supported |
V6.1.0.11 and later |
32-bit |
64-bit |
x86-64: Intel EM64T and AMD64 |
Supported |
V6.1
(all versions) |
64-bit |
64-bit |
x86-64: Intel EM64T and AMD64 |
Supported |
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Resolving the
problem |
For WebSphere Application Server V5.1, it is necessary to
use the product on a Linux platform booted with a 32-bit kernel.
For WebSphere Application Server V6.0, either install and use the 64-bit
edition of the product on a Linux platform booted with a 64-bit kernel, or
install the 32-bit edition of the product on a Linux platform booted with
a 32-bit kernel when using x86-64 based hardware architecture.
For WebSphere Application Server V6.1, either install and use the 64-bit
edition of the product on a Linux platform booted with a 64-bit kernel, or
install the 32-bit edition product on a Linux platform booted with a
64-bit kernel, and upgrade the product to version 6.1.0.11 prior to
starting any application server processes.
If issues are encountered while installing WebSphere Application Server
V6.1, 32-bit edition, on a Linux platform booted with a 64-bit kernel,
refer to the technote, "A
supported operating system architecture is not detected when installing
32-bit editions on newly-supported 64-bit operating systems". That
technote explains how to adjust the prerequisite checker to accept this
newly-supported configuration. Alternatively, it is possible to specify
the -OPT disableOSPrereqChecking="true" option during a
silent installation
Additional Information
For more information about the hardware and software requirements for all
versions of WebSphere Application Server, refer to the Detailed
System Requirements page.
The 32-bit edition of WebSphere Application Server V6.0 and V6.1 cannot
be "converted" to 64-bit by installing a 64-bit maintenance pack. When the
32-bit edition of WebSphere Application Server V6.0 or V6.1 is installed,
that installation instance is committed to 32-bit mode. The 32-bit edition
of WebSphere Application Server V6.0 must be installed on a 32-bit based
Linux kernel when using x86-64 based hardware architecture. The 32-bit
edition of WebSphere Application Server V6.1 is supported when running on
a 64-bit kernel, but the product must be updated to version 6.1.0.11.
This document applies to environments using Linux on x86-64 based
hardware. For information regarding support of Linux platforms using
non-x86-64 hardware architecture (such as PowerPC®, iSeries™, or
zSeries®), refer to the Detailed
System Requirements page. For information regarding software support
of other UNIX®-based platforms (such as AIX®, HP-UX, or Solaris), refer to
that same page. |
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Cross Reference information |
Segment |
Product |
Component |
Platform |
Version |
Edition |
Application Servers |
Runtimes for Java Technology |
Java SDK |
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