Oracle iPlanet Web Server 6.1 With HeaderBufferSize set to 32K+ Can Experience KeepAlive Issues and Crash Occasionally (Doc ID 1605991.1)

Last updated on NOVEMBER 05, 2016

Applies to:

Oracle iPlanet Web Server - Version 6.1 to 6.1 [Release 6.1]
Information in this document applies to any platform.

Symptoms

On Oracle iPlanet Web Server  6.1.x, if the HeaderBufferSize is set in magnus.conf to a value greater than 32768, then the error response "HTTP/1.1 400 Bad Request' is sent to the second request in a keepalive session.

For example:

4] This returns the HTML response and keeps the telnet session in keepalive mode. Issue the same GET request.
5] The 400 response is returned.

Similarly after the HeaderBufferSize change, it is observed that there is intermittent Web Server crashes due to internal memory corruption.

Changes

HeaderBufferSize is set in magnus.conf to be 32768 or greater to accommodate large HTTP header request.

Cause

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