Do I need to recycle JVM to turn off/on tracing in toggles.pbd?
Article ID: 104619
Updated On:
Products
APP PERF MANAGEMENT
CA Application Performance Management Agent (APM / Wily / Introscope)
CUSTOMER EXPERIENCE MANAGER
INTROSCOPE
Issue/Introduction
Do I need to recycle JVM to turn off/on tracing in toggles.pbd?
Environment
Java Agents from 9.7 release until 10x
Resolution
AutoProbe cannot dynamically instrument the tracers configured with SubstituteClass directives. For example, the tracer for SocketTracing have been configured with the following:
This is the reason why you cannot dynamically change the SocketTracing by commenting / uncommenting TurnOn: SocketTracing.
You can say the same to UDPTracing as well. In fact, if you look into java2.pbd, there are a few tracers using SubstituteClass. They require a restart if you toggle it on/off in toggles pbd:
SetFlag: SocketTracing
SetFlag: UDPTracing
SetFlag: FileSystemTracing
SetFlag: ThreadTracing
Other tracers as most in j2ee.pbd do not use substitute class, and therefore can be dynamically instrumented.
SubstituteClassIfFlagged: SocketTracing java.net.Socket com.wily.introscope.agent.probe.net.ManagedSocket
This is the reason why you cannot dynamically change the SocketTracing by commenting / uncommenting TurnOn: SocketTracing.
You can say the same to UDPTracing as well. In fact, if you look into java2.pbd, there are a few tracers using SubstituteClass. They require a restart if you toggle it on/off in toggles pbd:
SetFlag: SocketTracing
SetFlag: UDPTracing
SetFlag: FileSystemTracing
SetFlag: ThreadTracing
Other tracers as most in j2ee.pbd do not use substitute class, and therefore can be dynamically instrumented.
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