Java processbuilder java io ioexception cannot run program

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java.io.IOException: Cannot run program «javac»: CreateProcess error=2, The system cannot find the file specified if the path to javac contains space #510

java.io.IOException: Cannot run program «javac»: CreateProcess error=2, The system cannot find the file specified if the path to javac contains space #510

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set PATH=d:\Distrib\Coding\Java\scala\sbt;d:\cygwin\bin;d:\cygwin\bin;c:\windows\system32; D:\Distrib\Coding\Java\jdk\jdk1.7.0_05\x86\bin
which javac
javac is an external : D:\Distrib\Coding\Java\jdk\jdk1.7.0_05\x86\bin\javac.EXE
xsbt clean compile
.
java.io.IOException: Cannot run program «javac»: CreateProcess error=2, The system cannot find the file specified
.
set PATH=d:\Distrib\Coding\Java\scala\sbt;d:\cygwin\bin;d:\cygwin\bin;c:\windows\system32;D:\Distrib\Coding\Java\jdk\jdk1.7.0_05\x86\bin
xsbt clean compile
.
[success]

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How to fix java.io.ioexception: cannot run program «dir»: createprocess error=2, das system?

The java.io.IOException: Cannot run program «dir»: CreateProcess error=2, The system cannot find the file specified error message is thrown when the Java code is trying to run a system command or program using the java.lang.ProcessBuilder class, and the specified program or command is not found in the PATH environment variable. In order to fix this issue, there are several methods that can be followed:

Method 1: Check if the program is installed

To fix the «java.io.IOException: Cannot run program «dir»: CreateProcess error=2, Das System?» error, you can check if the program is installed before executing it. Here’s an example code:

import java.io.IOException; public class ProgramChecker  public static void main(String[] args)  String program = "dir"; // replace with your program name try  Process process = new ProcessBuilder("where", program).start(); int exitCode = process.waitFor(); if (exitCode == 0)  System.out.println(program + " is installed."); // execute the program here > else  System.out.println(program + " is not installed."); // handle the error here > > catch (IOException | InterruptedException e)  e.printStackTrace(); > > >

This code uses the ProcessBuilder class to execute the where command, which searches for the program in the system’s path. If the program is found, the exitCode will be 0, indicating success. If the program is not found, the exitCode will be non-zero, indicating failure.

You can replace the program variable with the name of the program you want to check. If the program is installed, you can execute it by adding the code to the if block. If the program is not installed, you can handle the error by adding the code to the else block.

This code can be split into the following steps:

1. Import the java.io.IOException class.
2. Create a ProgramChecker class.
3. Define the main method.
4. Set the program variable to the name of the program you want to check.
5. Use the ProcessBuilder class to execute the where command with the program argument.
6. Get the exitCode of the process.
7. Check if the exitCode is 0 to see if the program is installed.
8. If the program is installed, execute it.
9. If the program is not installed, handle the error.

This approach can help you avoid the «java.io.IOException: Cannot run program» error by checking if the program is installed before executing it.

Method 2: Specify the full path of the program

To fix the «java.io.IOException: Cannot run program «dir»: CreateProcess error=2, Das System?» error in Java, you can specify the full path of the program you want to run. Here’s how:

1. First, get the full path of the program you want to run. For example, if you want to run the «dir» command on Windows, the full path is «C:\Windows\System32\cmd.exe».
2. In your Java code, use the ProcessBuilder class to create a new process and specify the full path of the program as the command. Here’s an example:

String command = "C:\\Windows\\System32\\cmd.exe /c dir"; ProcessBuilder pb = new ProcessBuilder(command); Process process = pb.start();

In this example, the «/c» option is used to run the «dir» command and then exit the command prompt.

1. You can also set the working directory for the process using the ProcessBuilder’s directory() method. For example:

String command = "C:\\Windows\\System32\\cmd.exe /c dir"; ProcessBuilder pb = new ProcessBuilder(command); pb.directory(new File("C:\\Users\\JohnDoe\\Documents")); Process process = pb.start();

In this example, the working directory for the process is set to «C:\Users\JohnDoe\Documents».

1. Finally, you can read the output of the process using the process’s input stream. Here’s an example:

String command = "C:\\Windows\\System32\\cmd.exe /c dir"; ProcessBuilder pb = new ProcessBuilder(command); Process process = pb.start(); BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream())); String line; while ((line = reader.readLine()) != null)

In this example, the output of the «dir» command is printed to the console.

That’s it! By specifying the full path of the program you want to run, you can avoid the «java.io.IOException: Cannot run program» error in Java.

Method 3: Add the location of the program to PATH environment variable

To fix the «java.io.IOException: Cannot run program «dir»: CreateProcess error=2, Das System?» error in Java, you can add the location of the program to the PATH environment variable. Here are the steps to do it:

1. Find the location of the program that you want to run. In this case, «dir» is a command-line tool that is included in Windows, so the location is usually «C:\Windows\System32».
2. Open the Control Panel and go to System > Advanced system settings > Environment Variables.
3. Under System Variables, find the «Path» variable and click «Edit».
4. Click «New» and add the location of the program that you found in step 1.
5. Click «OK» to close all the windows.

Here is an example Java code that demonstrates how to run the «dir» command:

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Main < public static void main(String[] args) < try < Process process = Runtime.getRuntime().exec("cmd /c dir"); BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream())); String line; while ((line = reader.readLine()) != null) < System.out.println(line); >reader.close(); > catch (IOException e) < e.printStackTrace(); >> >

In this code, we use the Runtime.getRuntime().exec() method to run the «cmd /c dir» command, which opens a command prompt and runs the «dir» command. Then, we use a BufferedReader to read the output of the command and print it to the console.

Note that we use «cmd /c» before the command to ensure that it is executed within a command prompt. This is necessary because the «dir» command is not an executable program, but a command that is built into the command prompt.

By adding the location of the «dir» command to the PATH environment variable, we ensure that the command can be found and executed by the Runtime.getRuntime().exec() method.

Method 4: Use ProcessBuilder.start() instead of Runtime.getRuntime().exec()

To fix the error «Java: how to fix java.io.IOException: Cannot run program «dir»: CreateProcess error=2, Das System?», you can use ProcessBuilder.start() instead of Runtime.getRuntime().exec(). Here’s how to do it:

ProcessBuilder builder = new ProcessBuilder("dir");

builder.directory(new File("C:\\Users\\username\\Documents"));

builder.redirectErrorStream(true);

Process process = builder.start();

InputStream inputStream = process.getInputStream(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String line; while ((line = reader.readLine()) != null)  System.out.println(line); >

int exitCode = process.waitFor(); System.out.println("Exited with error code " + exitCode);

import java.io.BufferedReader; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; public class ProcessBuilderExample  public static void main(String[] args) throws IOException, InterruptedException  ProcessBuilder builder = new ProcessBuilder("dir"); builder.directory(new File("C:\\Users\\username\\Documents")); builder.redirectErrorStream(true); Process process = builder.start(); InputStream inputStream = process.getInputStream(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String line; while ((line = reader.readLine()) != null)  System.out.println(line); > int exitCode = process.waitFor(); System.out.println("Exited with error code " + exitCode); > >

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We are starting a java process from each executor of our streaming job. To start that java process we are using the following code:

SparkProcess process = new SparkProcess();

we are getting the following error:

Cannot run program «java» (in directory «»): error=2, No such file or directory at com.subex.roc.dataload.kafka2hive.StorageFunction$1.call(StorageFunction.java:631) at com.subex.roc.dataload.kafka2hive.StorageFunction$1.call(StorageFunction.java:554) at org.apache.spark.api.java.JavaRDDLike$anonfun$foreachPartition$1.apply(JavaRDDLike.scala:219) at org.apache.spark.api.java.JavaRDDLike$anonfun$foreachPartition$1.apply(JavaRDDLike.scala:219) at org.apache.spark.rdd.RDD$anonfun$foreachPartition$1$anonfun$apply$29.apply(RDD.scala:926) at org.apache.spark.rdd.RDD$anonfun$foreachPartition$1$anonfun$apply$29.apply(RDD.scala:926) at org.apache.spark.SparkContext$anonfun$runJob$5.apply(SparkContext.scala:2069) at org.apache.spark.SparkContext$anonfun$runJob$5.apply(SparkContext.scala:2069) at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87) at org.apache.spark.scheduler.Task.run(Task.scala:108) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:338) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.io.IOException: Cannot run program «java» (in directory «»): error=2, No such file or directory at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048) at com.subex.sparkcommon.process.SparkProcess.execute(SparkProcess.java:50) at com.subex.roc.dataload.kafka2hive.StorageFunction$1.call(StorageFunction.java:615) . 13 more Caused by: java.io.IOException: error=2, No such file or directory at java.lang.UNIXProcess.forkAndExec(Native Method) at java.lang.UNIXProcess.(UNIXProcess.java:247) at java.lang.ProcessImpl.start(ProcessImpl.java:134) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) . 15 more

We gave all permissions to the jar path and also to java path but still we are getting this error. The bashrc path has the java home and the path is also set to $JAVA_HOME/bin.

We are using HDP version 2.6.3

Please suggest what am I missing here. Also, please let me know should you need more info.

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