Default value and behavior changes from previous releases of WebSphere® Application Server traditional

When you upgrade the application server to a newer version, be aware of the following default values and behaviors that changed.

Default value and behavior changes in Version 9.0

Table 1. Default value and behavior changes in Version 9.0
Function area	What changed	Version 9.0	Previous versions	More information
Configuration files	IgnoreAffinityRequests	The recommended value for the IgnoreAffinityRequests custom property is `true`. Some fix pack levels default to `false`. Change the default value to `true` if it is set to `false`.	Value dependent on the distribution of the configuration file and the method of the configuration file generation	plugin-cfg.xml file
High availability and workload management	Core group custom property: IBM_CS_OOM_ACTION	Isolate	No default value	Core group custom properties
	Cell cluster custom property: IBM_CLUSTER_REUSE_ORIGINAL_IOR	True	No default value	Cell custom properties
	Proxy server setting: High availability monitor timeout	0	300	Proxy server settings
	Core group member default protocol selection	Core group member communication defaults to using the highest protocol version.	Lowest protocol version used	Core group protocol versions
Resources	JPA data source error handling	A misconfigured `<jta-data-source>` or `<non-jta-data-source>` element in the persistence.xml file that is associated with an EntityManager or EntityManagerFactory object must be fixed or removed.	If the product tries to access a misconfigured `<jta-data-source>` or `<non-jta-data-source>` element in the persistence.xml file that is associated with an EntityManager or EntityManagerFactory object, the product issues a CWWJP0013E error message and then ignores the misconfigured data source.	N/A
Web server plug-in	esiEnable	False	True	Configuring Edge Side Include caching plugin-cfg.xml file
Web server plug-in	KillWebServerStartUpOnParseErr	True	False	Web server plug-in custom properties
Web server plug-in	StrictSecurity	True	False	Web server plug-in custom properties
Security	SSL Configuration attribute: sslProtocol	SSL_TLSv2	SSL_TLS	SSL configurations
Security	The default value for `com.ibm.websphere.security.useAllSSLClientAuthKeytypes`	Starting in 9.0.5.9, the default value is `true`. Before 9.0.5.9, the default is `false`.	False	Security custom properties
Security	The default value for `com.ibm.websphere.ssl.include.ECCiphers`	True	False	Security custom properties
Security	The default value for the `provider_<id>.setLtpaCookie` property	The default value is `true` when the useJwtFromRequest OIDC property is set to the `required` value. The default value is `false` when the useJwtFromRequest OIDC property is set to the `ifPresent` value or the `no` value.	False	OpenID Connect Relying Party custom properties
Contexts and dependency injection	Implicit bean archives	The CDI 1.2 implementation defines two different types of bean archives, explicit and implicit. The implicit bean archive can result in an existing archive that is incorrectly interpreted as an implicit bean archive in the CDI 1.2 implementation. To stop this behavior, you can add a beans.xml file with the bean discovery mode set to `none` to prevent the archive from being a bean archive.	The CDI 1.0 implementation does not define implicit bean archives.	Contexts and Dependency Injection 1.2 behavior changes
Security	The default value for the salt length setting in the administrative console or for the saltLength parameter	`32`
Security	The default value for the message digest algorithm setting in the administrative console or for the messageDigestAlgorithm parameter	PBKDF2WithHmacSHA1
Java virtual machine settings	Initial heap size and maximum heap size	The default initial heap size for the controller is 256 MB, and the default initial heap size for the servant is 512 MB. The default maximum heap size for the controller is 512 MB, and the default maximum heap size for the servant is 1024 MB.	For Version 8.5.5, see initial heap size and maximum heap size in Java virtual machine settings

Default value and behavior changes in Version 8.5

Table 2. Default value and behavior changes in Version 8.5
Function area	What changed	Version 8.5	Previous versions	More information
Configuration files	IgnoreAffinityRequests	Version 8.5.5.19 and later: The recommended value for the IgnoreAffinityRequests custom property is `true`. Some fix pack levels default to `false`. Change the default value to `true` if it is set to `false`.	Value dependent on the distribution of the configuration file and the method of the configuration file generation	plugin-cfg.xml file
Custom properties	Java virtual machine custom property: com.ibm.websphere.logging.useJULThreadID	False	True	Java virtual machine custom properties
Settings	Connection pool minimum connection setting	Version 8.5.5.9 and later: 0 Version 8.5.5.8 and earlier: 1	1	Connection pool settings
Settings	HTTP transport channel settings "Discrimination failed" exception in the HTTP Channel	500 response code	403 response code	HTTP transport channel settings
Settings	Maximum buffer size used when reading HTTP request content. PostBufferSize element in the plugin-cfg.xml file	0	64	Web server plug-in request routing properties
Web server plug-in	Secure connection creation behavior	If the web server plug-in attempts create an HTTPS connection but fails, it does not create a connection. In Version 8.5.0.x, the web server plug-in attempts create an HTTPS connection but fails, it attempts to create an HTTP connection.	If the web server plug-in attempts create an HTTPS connection but fails, it attempts to create an HTTP connection.	Web server plug-in connections Web server plug-in custom properties
Security	The default value for the salt length setting in the administrative console or for the saltLength parameter	`32`
Security	The default value for the message digest algorithm setting in the administrative console or for the messageDigestAlgorithm parameter	PBKDF2WithHmacSHA1

Default value and behavior changes in Version 8.0

Table 3. Default value and behavior changes in Version 8.0
Function area	What changed	Version 8.0	Version 7.0	More information
Commands (wsadmin scripting)	ClusterConfigCommands command group for the AdminTask object Parameter: -resourcesScope	cluster	both	ClusterConfigCommands command group for the AdminTask object
Custom properties	Object Request Broker custom properties com.ibm.CORBA.ConnectTimeout	10	0	Object Request Broker custom properties
Custom properties	Web container custom properties com.ibm.ws.webcontainer.throwpostconstructexception	True	False	Web container custom properties
Settings	Accept content for all requests setting	True	False	Web server plug-in request and response optimization properties
Settings	Thread pool settings: Thread inactivity timeout	60000 milliseconds	35000 milliseconds	Thread pool settings
Settings	The Use read/write timeout setting on the administrative console, or the ServerIOTimeout attribute in the plugin-cfg.xml file	900 seconds	60 seconds	Application Server property settings for a web server plug-in