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Hazel 4.1.1


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The probe level for most of the network related statistics has been changed to "DEBUG" to decrease the pressure on Management Center; now they are not sent to Management Center by default. If you want to see these statistics, you need to set the "hazelcast.metrics.debug.enabled" property to true.#21275


Introduced a configuration property to ignore errors during enabling theXXE protection. This protection works with JAXP 1.5 (Java 7 Update 40) and newer.When an older JAXP implementation is added to the classpath, e.g., Xerces and Xalan,an exception is thrown. The newly introduced property, namely hazelcast.ignoreXxeProtectionFailures,allows you to ignore those exceptions.#17839


To decrease the load on the Management Center for large clusters, the level of network related metrics has been changed to DEBUG. When you need these metrics, you can use the hazelcast.metrics.debug.enabled property.#21260


Improved the log message that is displayed when using the hazelcast.io.selectorModeproperty to decrease the high CPU usage. The previous misleading message read as"Recreated Selector because of possible java/network stack bug". It has been changedto "Selector was rebuilt, consider updating Java and/or your network stack drivers".#19761


Introduced the hazelcast.internal.map.expired.key.scan.timeout.nanos propertyto limit the execution time of the cleanup operations, i.e., entry expiration tasks of a map;this is to prevent the increased CPU usage as the partition size grows.#19663


When the user code deployment is used and the classes to be deployedhave com.hazelcast prefix, it was causing failures in other Hazelcastproducts, e.g., Jet. This has been fixed by making use of the context classloaderwhen loading such classes.#17915


Introduced a configuration property to ignore errors duringenabling the XXE protection. This protection works with JAXP 1.5 (Java 7 Update 40)and newer. When an older JAXP implementation is added tothe classpath, e.g., Xerces and Xalan, an exception is thrown.The newly introduced property, namely hazelcast.ignoreXxeProtectionFailures,allows you to ignore those exceptions.See the System Properties appendix of the IMDG Reference Manual for more information.


Parallel Independent Migrations: Parallelized the partition replica migrations so thatthe time needed for rebalancing the partitions after addingor removing a member to/from a cluster is reduced. See the hazelcast.partition.max.parallel.migrations property explanation in theSystem Properties appendix.


Introduced the hazelcast.logging.details.enabled propertyto make the logging of cluster version, name and IP optional todecrease the noise in the logs when, for example, you have a single-member cluster.#16622


Introduced a configuration property to ignore errors during enabling the XXE protection.This protection works with JAXP 1.5 (Java 7 Update 40) and newer. When an older JAXPimplementation is added to the classpath, e.g., Xerces and Xalan, an exception is thrown.The newly introduced property, namely hazelcast.ignoreXxeProtectionFailures, allows you to ignore those exceptions.See System Properties for more information.#17869


When the user code deployment is used and the classes to be deployed havecom.hazelcast prefix, it was causing failures in other Hazelcast products, e.g., Jet.This has been fixed by making use of the context classloader when loading such classes.#17584


Introduced the hazelcast.logging.details.enabled property to make the loggingof cluster version, name and IP optional to decrease the noise in the logs when, forexample, you have a single-member cluster.#16630


Moby Naming: Introduced friendly names for the Hazelcast instances to be shownin the Hazelcast Management Center. See the Checking the Instances' Name section. Also, a new system property, hazelcast.member.naming.moby.enabled, is introduced for this purpose.


Single Thread Hazelcast Clients Performance: Hazelcast clients have been designed to beused by multiple threads; the more threads




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