Profiler Agent Error: Exception when trying to send response or command to client: UTFDataFormatException

[nestorjb]

Hi

I'm using the latest VisualVM 1.4.1 release on OpenJDK 1.8.0_131. When I try to run the Memory Profiling tool I get on the console of the Java process:

Profiler Agent: JNI OnLoad Initializing...
Profiler Agent: JNI OnLoad Initialized successfully
Profiler Agent: Waiting for connection on port 5140 (Protocol version: 18)
Profiler Agent: Established connection with the tool
Profiler Agent Error: Exception when trying to send response or command to client:
java.io.UTFDataFormatException
java.io.UTFDataFormatException
at java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:2164)
at java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:2007)
at java.io.ObjectOutputStream.writeUTF(ObjectOutputStream.java:869)
at org.netbeans.lib.profiler.wireprotocol.VMPropertiesResponse.writeObject(VMPropertiesResponse.java:203)
at org.netbeans.lib.profiler.wireprotocol.WireIO.sendComplexResponse(WireIO.java:336)
at org.netbeans.lib.profiler.server.ProfilerServer.sendComplexResponseToClient(ProfilerServer.java:724)
at org.netbeans.lib.profiler.server.ProfilerServer.handleClientCommand(ProfilerServer.java:1614)
at org.netbeans.lib.profiler.server.ProfilerServer.listenToClient(ProfilerServer.java:1777)
at org.netbeans.lib.profiler.server.ProfilerServer.run(ProfilerServer.java:700)
Profiler Agent: Connection with agent closed
Profiler Agent: Connection with agent closed

Any ideas?

[thurka]

It looks like there are some strange characters on the classpath of your profiled application. Can you please create application snapshot from your application and attach it to this issue? The classpath should be visible in system properties tab.

[mirkoebert]

I have the same problem
Profiler Agent: Waiting for connection on port 5140 (Protocol version: 18)
Profiler Agent: Established connection with the tool
Profiler Agent Error: Exception when trying to send response or command to client:
java.io.UTFDataFormatException
java.io.UTFDataFormatException
at java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:2164)
at java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:2007)
at java.io.ObjectOutputStream.writeUTF(ObjectOutputStream.java:869)
at org.netbeans.lib.profiler.wireprotocol.VMPropertiesResponse.writeObject(VMPropertiesResponse.java:203)
at org.netbeans.lib.profiler.wireprotocol.WireIO.sendComplexResponse(WireIO.java:336)
at org.netbeans.lib.profiler.server.ProfilerServer.sendComplexResponseToClient(ProfilerServer.java:724)
at org.netbeans.lib.profiler.server.ProfilerServer.handleClientCommand(ProfilerServer.java:1614)
at org.netbeans.lib.profiler.server.ProfilerServer.listenToClient(ProfilerServer.java:1777)
at org.netbeans.lib.profiler.server.ProfilerServer.run(ProfilerServer.java:700)
Profiler Agent: Connection with agent closed

From System properties:
java.version=1.8.0_152
java.vm.info=mixed mode
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
java.vm.specification.name=Java Virtual Machine Specification
java.vm.specification.vendor=Oracle Corporation
java.vm.specification.version=1.8
java.vm.vendor=Oracle Corporation
java.vm.version=25.152-b16
line.separator=\n
....
os.arch=x86_64
os.name=Mac OS X
os.version=10.14.1
path.separator=:
socksNonProxyHosts=local|.local|169.254/16|.169.254/16
spring.beaninfo.ignore=true
sun.arch.data.model=64
sun.boot.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/classes
sun.boot.library.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/jre/lib

[thurka]

It looks like the problem is caused by extremely long classpath of your profiler application (system property java.class.path). Please take an Application Snapshot of the application you want to profile and attach it to this issue. This way we can verify this hypothesis.

[mirkoebert]

My problem is, thats not my application and I can't put a snapshot here, but I try a different app and hope to see the same problem.

[thurka]

My problem is, thats not my application and I can't put a snapshot here, but I try a different app and hope to see the same problem.

Any update?
BTW: I am not sure why the fact that it is not your application, prevents you to add an Application Snapshot to this issue.

[flozano]

I'm getting the same:

Profiler Agent: Established connection with the tool
Profiler Agent Error: Exception when trying to send response or command to client:
java.io.UTFDataFormatException
Profiler Agent: Connection with agent closed
Profiler Agent: Connection with agent closed
java.io.UTFDataFormatException
	at java.base/java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:2170)
	at java.base/java.io.ObjectOutputStream$BlockDataOutputStream.writeUTF(ObjectOutputStream.java:2013)
	at java.base/java.io.ObjectOutputStream.writeUTF(ObjectOutputStream.java:872)
	at org.netbeans.lib.profiler.wireprotocol.VMPropertiesResponse.writeObject(VMPropertiesResponse.java:203)
	at org.netbeans.lib.profiler.wireprotocol.WireIO.sendComplexResponse(WireIO.java:336)
	at org.netbeans.lib.profiler.server.ProfilerServer.sendComplexResponseToClient(ProfilerServer.java:724)
	at org.netbeans.lib.profiler.server.ProfilerServer.handleClientCommand(ProfilerServer.java:1614)
	at org.netbeans.lib.profiler.server.ProfilerServer.listenToClient(ProfilerServer.java:1777)
	at org.netbeans.lib.profiler.server.ProfilerServer.run(ProfilerServer.java:700)

and yes, my classpath is really big. I also can't put a snapshot, unfortunately...

[thurka]

Hopefully fixed in master.