java - ProcessBuilder 与 Runtime.getRuntime().exec 不同的行为

Question

给定代码:

public String execCommand(String command, File folder) { 

        if (folder.isDirectory() && Files.isDirectory(folder.toPath())) {
            logger.info("It is a directory!"); //yes, is a directory!
        }

        try {

            Process runtimeProc = Runtime.getRuntime().exec(command, null, folder);       

            Process builderProc = new ProcessBuilder(command)
                    .directory(folder)
                    .redirectErrorStream(true)
                    .start();

        } catch (InterruptedException | IOException e) {
            logger.log(Level.SEVERE, e, e::getMessage);
            throw new IllegalStateException(e);
        }
    }

当我运行代码时，它会毫无问题地执行 runtimeProc，但是 builderProc 会抛出 IOException:

Cannot run program "myexecutable" (in directory "/home/testing/1acbcd01-76d2-4981-8fd3-b863d6f9ede8"): error=20, Not a directory: java.io.IOException: Cannot run program "myexecutable action" (in directory "/home/testing/1acbcd01-76d2-4981-8fd3-b863d6f9ede8"): error=20, Not a directory

通读代码后，我注意到在内部 Runtime.exec() 使用了 ProcessBuilder 类。一个在工作而另一个在抛出异常怎么可能？更重要的是:如何解决？

调试时“爆点”在jdk的ProcessBuilder类内部:

try {
            return ProcessImpl.start(cmdarray,
                                     environment,
                                     dir,
                                     redirects,
                                     redirectErrorStream);
        } catch (IOException | IllegalArgumentException e) {
            String exceptionInfo = ": " + e.getMessage();
            Throwable cause = e;
            if ((e instanceof IOException) && security != null) {
                // Can not disclose the fail reason for read-protected files.
                try {
                    security.checkRead(prog);
                } catch (SecurityException se) {
                    exceptionInfo = "";
                    cause = se;
                }
            }
            // It's much easier for us to create a high-quality error
            // message than the low-level C code which found the problem.
            throw new IOException(
                "Cannot run program \"" + prog + "\""
                + (dir == null ? "" : " (in directory \"" + dir + "\")")
                + exceptionInfo,
                cause);
        }

完整的堆栈跟踪:

20:45:39,578 SEVERE [com.smorales.javalab.workspaceprocessor.control.Executor] (default task-32) Cannot run program "buildr run" (in directory "/home/wildfly/656a5d23-6457-4ee8-b2d8-d5b679c0a654"): error=20, Not a directory: java.io.IOException: Cannot run program "buildr run" (in directory "/home/wildfly/656a5d23-6457-4ee8-b2d8-d5b679c0a654"): error=20, Not a directory                                                                                                                                                                
app_1   |       at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
app_1   |       at com.smorales.javalab.workspaceprocessor.control.Executor.execCommand(Executor.java:38)
app_1   |       at com.smorales.javalab.workspaceprocessor.boundary.buildtool.BuildTool.runClass(BuildTool.java:91)
app_1   |       at com.smorales.javalab.workspaceprocessor.boundary.buildtool.BuildTool.runCode(BuildTool.java:49)
app_1   |       at com.smorales.javalab.workspaceprocessor.boundary.WorkspaceProcessor.runCode(WorkspaceProcessor.java:62)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
app_1   |       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
app_1   |       at java.lang.reflect.Method.invoke(Method.java:498)
app_1   |       at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
app_1   |       at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.delegateInterception(Jsr299BindingsInterceptor.java:70)
app_1   |       at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:80)
app_1   |       at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93)
app_1   |       at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
app_1   |       at com.smorales.javalab.workspaceprocessor.tracing.TimeLogger.logTime(TimeLogger.java:19)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
app_1   |       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
app_1   |       at java.lang.reflect.Method.invoke(Method.java:498)
app_1   |       at org.jboss.as.ee.component.ManagedReferenceLifecycleMethodInterceptor.processInvocation(ManagedReferenceLifecycleMethodInterceptor.java:89)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
app_1   |       at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:64)
app_1   |       at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
app_1   |       at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInCallerTx(CMTTxInterceptor.java:254)
app_1   |       at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:329)
app_1   |       at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:66)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:54)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356)
app_1   |       at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:636)
app_1   |       at org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356)
app_1   |       at org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
app_1   |       at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:195)
app_1   |       at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
app_1   |       at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73)
app_1   |       at com.smorales.javalab.workspaceprocessor.boundary.WorkspaceProcessor$$$view47.runCode(Unknown Source)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
app_1   |       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
app_1   |       at java.lang.reflect.Method.invoke(Method.java:498)
app_1   |       at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:436)
app_1   |       at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:127)
app_1   |       at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56)
app_1   |       at org.jboss.weld.bean.proxy.InjectionPointPropagatingEnterpriseTargetBeanInstance.invoke(InjectionPointPropagatingEnterpriseTargetBeanInstance.java:67)
app_1   |       at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100)
app_1   |       at com.smorales.javalab.workspaceprocessor.boundary.WorkspaceProcessor$Proxy$_$$_Weld$EnterpriseProxy$.runCode(Unknown Source)
app_1   |       at com.smorales.javalab.workspaceprocessor.boundary.rest.WorkspaceProcessorResource.runCode(WorkspaceProcessorResource.java:44)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
app_1   |       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
app_1   |       at java.lang.reflect.Method.invoke(Method.java:498)
app_1   |       at org.jboss.as.ee.component.ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptor.java:52)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
app_1   |       at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.doMethodInterception(Jsr299BindingsInterceptor.java:82)
app_1   |       at org.jboss.as.weld.ejb.Jsr299BindingsInterceptor.processInvocation(Jsr299BindingsInterceptor.java:93)
app_1   |       at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:63)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.invocationmetrics.ExecutionTimeInterceptor.processInvocation(ExecutionTimeInterceptor.java:43)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:437)
app_1   |       at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:64)
app_1   |       at org.jboss.as.weld.ejb.EjbRequestScopeActivationInterceptor.processInvocation(EjbRequestScopeActivationInterceptor.java:83)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ee.concurrent.ConcurrentContextInterceptor.processInvocation(ConcurrentContextInterceptor.java:45)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
app_1   |       at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:52)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275)
app_1   |       at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:327)
app_1   |       at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:239)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.security.SecurityContextInterceptor.processInvocation(SecurityContextInterceptor.java:100)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:66)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:54)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ContextClassLoaderInterceptor.processInvocation(ContextClassLoaderInterceptor.java:64)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356)
app_1   |       at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:636)
app_1   |       at org.jboss.invocation.AccessCheckingInterceptor.processInvocation(AccessCheckingInterceptor.java:61)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.InterceptorContext.run(InterceptorContext.java:356)
app_1   |       at org.jboss.invocation.PrivilegedWithCombinerInterceptor.processInvocation(PrivilegedWithCombinerInterceptor.java:80)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
app_1   |       at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:195)
app_1   |       at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185)
app_1   |       at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:340)
app_1   |       at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61)
app_1   |       at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73)
app_1   |       at com.smorales.javalab.workspaceprocessor.boundary.rest.WorkspaceProcessorResource$$$view48.runCode(Unknown Source)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
app_1   |       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
app_1   |       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
app_1   |       at java.lang.reflect.Method.invoke(Method.java:498)
app_1   |       at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139)
app_1   |       at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
app_1   |       at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
app_1   |       at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236)
app_1   |       at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:395)
app_1   |       at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:202)
app_1   |       at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
app_1   |       at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
app_1   |       at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
app_1   |       at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
app_1   |       at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
app_1   |       at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
app_1   |       at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
app_1   |       at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
app_1   |       at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
app_1   |       at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
app_1   |       at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
app_1   |       at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
app_1   |       at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
app_1   |       at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
app_1   |       at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
app_1   |       at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
app_1   |       at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
app_1   |       at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
app_1   |       at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
app_1   |       at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
app_1   |       at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
app_1   |       at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
app_1   |       at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
app_1   |       at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
app_1   |       at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
app_1   |       at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
app_1   |       at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
app_1   |       at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)
app_1   |       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
app_1   |       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
app_1   |       at java.lang.Thread.run(Thread.java:745)
app_1   | Caused by: java.io.IOException: error=20, Not a directory
app_1   |       at java.lang.UNIXProcess.forkAndExec(Native Method)
app_1   |       at java.lang.UNIXProcess.<init>(UNIXProcess.java:248)
app_1   |       at java.lang.ProcessImpl.start(ProcessImpl.java:134)
app_1   |       at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
app_1   |       ... 189 more

Answer 1

我发现了不同之处:

默认情况下 Runtime.getRuntime().exec 将标记输入，在 ProcessBuilder 的情况下它将按原样执行命令(即:不会标记化)

这就是Runtime版本可以正常运行的原因，它将命令分隔为:["buildr", "run"] 另一方面，ProcessBuilder 将运行为:["buildr run"]。

解决方案:在使用 ProcessBuilder 之前标记化例如:

String[] cmdAsTokens = command.split(" ");
Process process = new ProcessBuilder(cmdAsTokens)
                .directory(folder)
                .redirectErrorStream(true)
                .start();