剖析 Corda 应用程序

Profiling a Corda Application

我正在尝试 运行 针对 CorDapp 进行一些检测/分析 - 对于这个问题,示例 cordapp 在这里:https://github.com/corda/cordapp-example.git version release-3.

但是,当我尝试根据来自 corda shell 的 jvm runtime 将 VisualVM 附加到 运行ning PID 时,我收到如下错误:

(来自 VisualVM 的配置文件选项卡)

Mon Jun 11 15:17:36 BST 2018>>> 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: Local accelerated session Profiler Agent Error: Exception when handling command from client: java.io.InvalidClassException: filter status: REJECTED Profiler Agent: Connection with agent closed

或(从采样器选项卡)

CPU sampling: Not available. Cannot access threads in target application. Check the logfile for details (use Help | About | Logfile).

日志文件给我这个有用的错误:

WARNING [org.netbeans.modules.profiler.NetBeansProfiler]: IDEAppStatusHandler - error: {)} *** Profiler error (Mon Jun 11 15:17:59 BST 2018): exception while trying to get response from the target JVM: java.net.SocketException: Connection reset INFO [com.sun.tools.visualvm.sampler.cpu.ThreadInfoProvider]: mxbeans.getThreadMXBean() returns null for Application [id: localhost-10884, pid: 10884, host: localhost]

我在 MacOS 和 Ubuntu 上都试过了,我遇到了同样的问题 - 所以我认为这不是 Java 安装问题。

有什么指点吗!?

VisualVM 使用 Java 序列化。出于安全原因,Corda 禁止 Java 序列化。

https://github.com/corda/corda/blob/release-V3/node/src/main/kotlin/net/corda/node/internal/NodeStartup.kt#L204:

open protected fun banJavaSerialisation(conf: NodeConfiguration) {
    SerialFilter.install(if (conf.notary?.bftSMaRt != null) ::bftSMaRtSerialFilter else ::defaultSerialFilter)
}