oracle/graal · error · GraalError

Reading JNI config in %s dumped by command: %s%n%s

Error message

Reading JNI config in %s dumped by command: %s%n%s

What it means

Error "Reading JNI config in %s dumped by command: %s%n%s" thrown in oracle/graal.

Source

Thrown at compiler/src/jdk.graal.compiler.libgraal/src/jdk/graal/compiler/libgraal/GetJNIConfig.java:114

        String nl = System.lineSeparator();
        String out = new BufferedReader(new InputStreamReader(p.getInputStream())).lines().collect(Collectors.joining(nl));

        int exitValue;
        try {
            exitValue = p.waitFor();
        } catch (InterruptedException e) {
            throw new GraalError(e, "Interrupted waiting for command: %s%n%s", quotedCommand, out);
        }
        if (exitValue != 0) {
            throw new GraalError("Command finished with exit value %d: %s%n%s", exitValue, quotedCommand, out);
        }
        try {
            lines = Files.readAllLines(configFilePath);
        } catch (IOException e) {
            Path cfp = configFilePath;
            configFilePath = null;
            throw new GraalError("Reading JNI config in %s dumped by command: %s%n%s", cfp, quotedCommand, out);
        }
    }

    static Path getJavaExe(Path javaHome) {
        boolean isWindows = GraalServices.getSavedProperty("os.name").contains("Windows");
        Path javaExe = javaHome.resolve(Path.of("bin", isWindows ? "java.exe" : "java"));
        if (!Files.isExecutable(javaExe)) {
            throw new GraalError("Java launcher %s does not exist or is not executable", javaExe);
        }
        return javaExe;
    }

    @Override
    public void close() {
        if (configFilePath != null && Files.exists(configFilePath)) {
            try {
                Files.delete(configFilePath);
                configFilePath = null;

View on GitHub (pinned to a66e9ccd1d)

Solutions

1. Fix the condition reported by the error: Reading JNI config in {} dumped by command: {} {}
2. Check the throwing call site and ensure its documented preconditions (argument values, types, environment, or configuration) are satisfied before the call.

Example fix

Validate inputs and environment so that the failing condition does not occur: Reading JNI config in {} dumped by command: {} {}

When it happens

Trigger: Thrown at compiler/src/jdk.graal.compiler.libgraal/src/jdk/graal/compiler/libgraal/GetJNIConfig.java:114 when the library encounters an invalid state.

Common situations: Occurs when a caller violates the contract guarded by this check: Reading JNI config in {} dumped by command: {} {}

AI-assisted analysis of oracle/graal@a66e9ccd1d (2026-08-14). Data as JSON: /api/errors/2f62069b735f17c3. Report an issue: GitHub.