Red Hat NETSCAPE MANAGEMENT SYSTEM 4.5 Instrukcja Użytkownika Pobierz pdf (Strona 23)

# /usr/local/apache/bin/httpd -l

Compiled-in modules:

http_core.c

mod_so.c

Windows NT support

Multiple instances support and Windows NT

Only a single Netscape Enterprise Server instance per system can be configured run with Allaire ClusterCATS on

NT.

Known problems

Unpredictable Behavior Internet Explorer from iPlanet 4.0 Web Server when all Cluster Members are Busy

Using Microsoft Internet Explorer (IE) to browse the *home page* of a completely busy ClusterCATS

cluster running the iPlanet 4.0 web server can cause a confusing results for the client.

Normally, in this case, when the all members of the cluster are busy, an HTTP 503 error response is

returned to the browser along with text like the following:

index.html is not currently available in cluseter KitKatCluster.

Please try again later.

Occasionally, when the busy web server is iPlanet 4.0, this result is not returned to IE when the home page

is browsed. Instead, a dialogue box may appear prompting the client for file-download information.

The workaround for this problem is to establish an "error URL" file for each server in the cluster. This is a

file containing a customized "server busy" message for your web site. This text is reliably returned to IE

when the cluster is busy.

NOTE: Instructions on creating an error-URL message are contained in the release note "Creating an

Alternate Web Server Response to 'Resource Not Available in Cluster' Message."

Adding or Creating a Cluster under heavy load

When you create a cluster or add a Web server to a cluster with the ClusterCATS Explorer and that Web

server is under heavy load, you may get a message that the "session aware bit could not be set." The

ClusterCATS Explorer will display the Web server with the "unreachable or unknown" icon. In this case,

click OK to dismiss the message, hide the cluster ("Hide Cluster" in the View menu), then show the cluster

again ("Show Cluster" in the View menu).

Netscape Enterprise Administrator Server

After installing Allaire ClusterCATS, Netscape Administrative Server will display a warning the next time

you attempt to manage your server with the Netscape Administrator. The warning states that the Netscape

configuration files have been modified "by hand." Click OK to accept the warning, then choose to Apply the

manual updates. If you do not apply the manual updates, Allaire ClusterCATS may be removed from the

Netscape plugin list. (If this happens, re-install Allaire ClusterCATS.)

Failover problems when routers are not configured to timeout their ARP cache

When ClusterCATS appears to be ARPing correctly, but there are persistent connectivity problems after

Failover has occurred, there may be a problem with one of the adjacent router's ARP cache timeout

settings. If the ARP cache timeout is off, set it to a value that is not too large, such as between 2 and 30

seconds. Accessing the router configuration settings will be vendor specific; refer to associated hardware

and software documentation for the router box.

ClusterCATS IP failover subsystem for NT IIS creates and removes the "Aliased IP addresses" Web site

The ClusterCATS IP failover subsystem creates an IIS Web site named "Aliased IP addresses" when at

least one IP address is "aliased" on the local system. This Web site is removed when the local system is

no longer aliasing any IP addresses. This Web site must not be managed with the Microsoft Management

Console (MMC). If this Web site is selected, or has its properties enumerated after the IP failover

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