Java application monitoring and management plugin

Verax NMS Java application management plugin allows easy monitoring, alerting, health check, management and performance reporting for any stand-alone Java applications (i.e. running without an application server) using Java 1.5 or higher. Applications are monitored via JMX MBeans (Management Beans).

General information view

The general view displays high level application information such as:

• Used Java Virtual Machine (JVM) information: vendor, version and bits (32 or 64).
• JVM process identifier (PID) in the operating system and JVM start time.
• Command line arguments such as Xmx or XX memory parameters and others.
• Class paths used and detailed list of Java Archives (JARs) loaded.
• External library paths (e.g. for JNI dynamic libraries or nonstandard JARs).

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Memory view

The memory view displays detailed application memory consumption in the JVM including:

• Totals for JVM's physical memory and swap space (used and available).
• Heap vs. non-heap memory usage: pool name, % used, initial usage, maximum usage and amount of committed memory.
• Detailed information about memory pools in the JVM: type, name, % used, initial usage, maximum usage and amount of committed.
• Detailed information about garbage collectors: name, number of collected objects, collection time and general status (valid, invalid)
• All objects requiring attention (e.g. invalid garbage collectors, excessively used memory pools) are highlighted for easy troubleshooting.

Threads view

The threads view displays detailed information about application's threads of execution:

• Thread totals: number of currently running threads, maximum peak threads since start and number of daemon threads.
• Numbers of loaded and unloaded Java classes.
• Detailed summary for each threads: thread name, state (runnable, blocked, etc.), block & wait counts, CPU time and deadlock status.
• All threads that have a deadlock are marked for easy troubleshooting.

Predefined Java application monitoring templates

The plugin contains predefined templates for most commonly monitored Java application items (by default Verax NMS creates default counters similar to the ones displayed by the JMX Console). Most important, selected templates are provided in the table below (other, additional sensors and performance counters can be added on any user-selected JMX MBean):

See also

Apache Tomcat application server management plugin 

JBoss application server management plugin