MuntashirAkon/AppManager · error · IOException

Could not start ADB service discovery

Error message

Could not start ADB service discovery

What it means

Guard in getLatestAdbDaemon(): the AdbMdns discovery instance failed to start (adbMdnsTcp.start() or, on P+, adbMdnsTls.start() failed), so mDNS service discovery cannot run at all. On Android this is usually caused by NSD/mDNS being unavailable on the current network or a missing multicast lock, not by the ADB daemon itself.

Solutions

1. Acquire a MulticastLock before starting mDNS discovery
2. Retry discovery after the network finishes connecting (Wi-Fi fully up)
3. Check that NSD/mDNS is supported and enabled on the device/network
4. Fall back to manual host/port input when discovery is unavailable

When it happens

Trigger: Thrown at app/src/main/java/io/github/muntashirakon/AppManager/adb/AdbUtils.java:91 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of MuntashirAkon/AppManager@0152f468fc (2026-09-12). Data as JSON: /api/errors/a5e972f3988eea16. Report an issue: GitHub.

Appendix: source

Thrown at app/src/main/java/io/github/muntashirakon/AppManager/adb/AdbUtils.java:91

        });
        AdbMdns adbMdnsTls = null;
        try {
            adbMdnsTcp.start();
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                adbMdnsTls = new AdbMdns(context, AdbMdns.SERVICE_TYPE_TLS_CONNECT, (hostAddress, port) -> {
                    if (hostAddress != null) {
                        atomicHostAddress.set(hostAddress.getHostAddress());
                        atomicPort.set(port);
                    }
                    resolveHostAndPort.countDown();
                });
                adbMdnsTls.start();
            }
            if (!resolveHostAndPort.await(timeout, unit)) {
                throw new InterruptedException("Timed out while trying to find a valid host address and port");
            }
        } catch (RuntimeException e) {
            throw new IOException("Could not start ADB service discovery", e);
        } finally {
            stopDiscovery(adbMdnsTcp);
            stopDiscovery(adbMdnsTls);
        }

        String host = atomicHostAddress.get();
        int port = atomicPort.get();
        if (host == null || port == -1) {
            throw new IOException("Could not find any valid host address or port");
        }
        return new Pair<>(host, port);
    }

    private static void stopDiscovery(AdbMdns adbMdns) {
        if (adbMdns == null) {
            return;
        }
        try {

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