StdioClientTransport fails to start subprocess via npx on Windows with "CreateProcess error=2"

[dynamic-bast]

reactor.core.Exceptions$ErrorCallbackNotImplemented: java.lang.RuntimeException: Failed to start process with command: [npx, -y, @modelcontextprotocol/server-filesystem, E:/]
Caused by: java.lang.RuntimeException: Failed to start process with command: [npx, -y, @modelcontextprotocol/server-filesystem, E:/]
at io.modelcontextprotocol.client.transport.StdioClientTransport.lambda$connect$1(StdioClientTransport.java:132) ~[mcp-0.9.0.jar:0.9.0]
at reactor.core.publisher.MonoRunnable.call(MonoRunnable.java:73) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.MonoRunnable.call(MonoRunnable.java:32) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxSubscribeOnCallable$CallableSubscribeOnSubscription.run(FluxSubscribeOnCallable.java:228) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28) ~[reactor-core-3.7.5.jar:3.7.5]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:840) ~[na:na]
Caused by: java.io.IOException: Cannot run program "npx": CreateProcess error=2, 系统找不到指定的文件。
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1143) ~[na:na]
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1073) ~[na:na]
at io.modelcontextprotocol.client.transport.StdioClientTransport.lambda$connect$1(StdioClientTransport.java:129) ~[mcp-0.9.0.jar:0.9.0]
... 10 common frames omitted
Caused by: java.io.IOException: CreateProcess error=2, 系统找不到指定的文件。
at java.base/java.lang.ProcessImpl.create(Native Method) ~[na:na]
at java.base/java.lang.ProcessImpl.(ProcessImpl.java:505) ~[na:na]
at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:158) ~[na:na]
at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1110) ~[na:na]
... 12 common frames omitted

mcp:
  client:
    enabled: true
    name: my-mcp-client
    version: 1.0.0
    request-timeout: 30s
    type: SYNC  # or ASYNC for reactive applications

    stdio:
      servers-configuration: classpath:mcp-servers.json

{
"mcpServers": {
"filesystem": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-filesystem",
"E:/"
]
}
}
}

[KevenCoder]

I also encountered this problem, how did you solve it?

[twelvet-s]

I also encountered this problem, how did you solve it?

修复npx无法启动

[dynamic-bast]

I also encountered this problem, how did you solve it?

"filesystem": {
  "command": "cmd",
  "args": [
    "/c",
    "npx",
    "-y",
    "@modelcontextprotocol/server-filesystem",
    "D:/"
  ]
},