OverloadProtectionMBean

Overview

This Mbean has attributes concerning server overload protection.

Fully Qualified Interface Name

If you use the getMBeanInfo operation in MBeanTypeServiceMBean, supply the following value as this MBean's fully qualified interface name:
weblogic.management.configuration.OverloadProtectionMBean

Factory Methods

No factory methods. Instances of this MBean are created automatically.

Access Points

You can access this MBean from the following MBean attributes:

Child MBeans

This section describes attributes that contain child MBeans. For more information about the MBean hierarchy, refer to WebLogic Server MBean Data Model.

ServerFailureTrigger

Configure a trigger that marks the server as failed when the condition is met. A failed server in turn can be configured to shutdown or go into admin state.

Attributes

This section describes the following attributes:

FailureAction

Enable automatic forceshutdown of the server on failed state. The server self-health monitoring detects fatal failures and mark the server as failed. The server can be restarted using NodeManager or a HA agent.

FreeMemoryPercentHighThreshold

Percentage free memory after which the server overload condition is cleared. WorkManagers stop performing overloadActions and start regular execution once the overload condition is cleared.

FreeMemoryPercentLowThreshold

Percentage free memory below which the server is considered overloaded. WorkManagers perform overloadAction once the server is marked as overloaded.

Name

The user-specified name of this MBean instance.

This name is included as one of the key properties in the MBean's javax.management.ObjectName:
Name=user-specified-name

Notes

Optional information that you can include to describe this configuration.

WebLogic Sever saves this note in the domain's configuration file (config.xml) as XML PCDATA. All left angle brackets (<) are converted to the XML entity <. Carriage returns/line feeds are preserved.

Note:

If you create or edit a note from the Administration Console, the Administration Console does not preserve carriage returns/line feeds.

PanicAction

Exit the server process when the kernel encounters a panic condition like an unhandled OOME. An unhandled OOME could lead to inconsistent state and a server restart is advisable if backed by node manager or a HA agent.

Parent

Return the immediate parent for this MBean

SharedCapacityForWorkManagers

Total number of requests that can be present in the server. This includes requests that are enqueued and those under execution.

The server performs a differentiated denial of service on reaching the shared capacity. A request with higher priority will be accepted in place of a lower priority request already in the queue. The lower priority request is kept waiting in the queue till all high priority requests are executed. Further enqueues of the low priority requests are rejected right away.

Type

Returns the type of the MBean.

Operations

This section describes the following operations:

freezeCurrentValue

If the specified attribute has not been set explicitly, and if the attribute has a default value, this operation forces the MBean to persist the default value.

Unless you use this operation, the default value is not saved and is subject to change if you update to a newer release of WebLogic Server. Invoking this operation isolates this MBean from the effects of such changes.

Note:

To insure that you are freezing the default value, invoke the restoreDefaultValue operation before you invoke this.

This operation has no effect if you invoke it on an attribute that does not provide a default value or on an attribute for which some other value has been set.

Deprecated. 9.0.0.0

Exceptions

• javax.management.AttributeNotFoundException
• javax.management.MBeanException

isSet

Returns true if the specified attribute has been set explicitly in this MBean instance.

restoreDefaultValue

If the specified attribute has a default value, this operation removes any value that has been set explicitly and causes the attribute to use the default value.

Default values are subject to change if you update to a newer release of WebLogic Server. To prevent the value from changing if you update to a newer release, invoke the freezeCurrentValue operation.

This operation has no effect if you invoke it on an attribute that does not provide a default value or on an attribute that is already using the default.

Deprecated. 9.0.0.0

Exceptions

• javax.management.AttributeNotFoundException

unSet

Restore the given property to its default value.