NationalSecurityAgency/ghidra · error · IOException

Could not start postgres server process

Error message

Could not start postgres server process

What it means

Thrown by startCommand() when `pg_ctl start -w` returns non-zero, meaning PostgreSQL failed to start within the wait window. BSim reports only the aggregate result, not the postgres log detail; the real cause is in the data directory's `logfile`.

Source

Thrown at Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/query/BSimControlLaunchable.java:1025

		discoverPostgresInstall();
		initializeDataDirectory();

		if (localAuthentication == AUTHENTICATION_PKI && certParameter == null) {
			throw new GeneralSecurityException(
				"Path to certificate necessary to start server (--cert /path/to/cert)");
		}
		File logFile = new File(dataDirectory, "logfile");
		List<String> command = new ArrayList<String>();
		command.add(postgresControl.getAbsolutePath());
		command.add("start");
		command.add("-w");
		command.add("-D");
		command.add(dataDirectory.getAbsolutePath());
		command.add("-l");
		command.add(logFile.getAbsolutePath());
		int res = runCommand(null, command, loadLibraryVar, loadLibraryValue);
		if (res != 0) {
			throw new IOException("Could not start postgres server process");
		}

		System.out.println("Server started");
		boolean extensionEnabled = true;
		try {
			enableLSHExtension();
		}
		catch (SQLException e) {
			System.out.println(e.getMessage());
			extensionEnabled = false;
		}
		if (extensionEnabled) {
			System.out.println("BSim extension enabled");
		}
		else {
			forceShutdown = true;			// Force a shutdown, because extension isn't enabled
			stopCommand();
		}

View on GitHub (pinned to d5f144c24d)

Solutions

1. Read `<dataDir>/logfile` for the exact postgres error.
2. Free the configured port or change --port.
3. Remove a stale `postmaster.pid` only if no postgres is actually running.
4. Regenerate server.crt/server.key if SSL startup fails.
5. Verify loadLibraryVar/loadLibraryValue and the discovered postgres install.
6. Increase resources / check dmesg for shared-memory limits.

// Pre-flight common startup blockers before invoking start.
File pid = new File(dataDir, "postmaster.pid");
if (pid.isFile()) {
    throw new IllegalStateException("Stale postmaster.pid present; server may already run or crashed: " + pid);
}

public boolean portFree(int port) {
    try (ServerSocket s = new ServerSocket(port)) { return true; }
    catch (IOException e) { return false; }
}

try {
    bsimControl.start(args);
} catch (IOException e) {
    if ("Could not start postgres server process".equals(e.getMessage())) {
        String log = Files.readString(Path.of(dataDir, "logfile"));
        throw new UserFacingException("pg_ctl start failed; postgres log:\n" + log, e);
    }
    throw e;
}

When it happens

Trigger: The constructed `pg_ctl start -w -D <dataDir> -l logfile` command exits non-zero because postgres could not bind the port, load config, or pass startup checks.

Common situations: Port already in use (--port collision); corrupt postgresql.conf/pg_hba.conf from a failed tuneConfig; missing or wrong ssl certs (server.crt/server.key); insufficient shared memory; wrong postgres version; leftover postmaster.pid from a crash; LD_LIBRARY_PATH not set so libs won't load.

Related errors

• Error initializing postgres database
• Error shutting down postgres server process
• Error getting postgres server status
• Error creating new user
• Unable to obtain password

AI-assisted analysis of NationalSecurityAgency/ghidra@d5f144c24d (2026-08-14). Data as JSON: /api/errors/924c33caa690eba5. Report an issue: GitHub.