Unable to start server listening on unix domain socket

[jck]

$ export KROKI_LISTEN=unix:///tmp/kroki.sock
$ java -jar kroki-server-v0.19.0.jar
12:07:18.470 [main] DEBUG io.vertx.core.logging.LoggerFactory - Using io.vertx.core.logging.SLF4JLogDelegateFactory
12:07:18.534 [main] DEBUG i.n.u.i.l.InternalLoggerFactory - Using SLF4J as the default logging framework
12:07:18.537 [main] DEBUG i.n.util.internal.PlatformDependent0 - -Dio.netty.noUnsafe: false
12:07:18.537 [main] DEBUG i.n.util.internal.PlatformDependent0 - Java version: 11
12:07:18.539 [main] DEBUG i.n.util.internal.PlatformDependent0 - sun.misc.Unsafe.theUnsafe: available
12:07:18.540 [main] DEBUG i.n.util.internal.PlatformDependent0 - sun.misc.Unsafe.copyMemory: available
12:07:18.541 [main] DEBUG i.n.util.internal.PlatformDependent0 - sun.misc.Unsafe.storeFence: available
12:07:18.541 [main] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.Buffer.address: available
12:07:18.542 [main] DEBUG i.n.util.internal.PlatformDependent0 - direct buffer constructor: unavailable: Reflective setAccessible(true) disabled
12:07:18.542 [main] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.Bits.unaligned: available, true
12:07:18.544 [main] DEBUG i.n.util.internal.PlatformDependent0 - jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable: class io.netty.util.internal.PlatformDependent0$7 cannot access class jdk.internal.misc.Unsafe (in module java.base) because module java.base does not export jdk.internal.misc to unnamed module @750e2b97
12:07:18.545 [main] DEBUG i.n.util.internal.PlatformDependent0 - java.nio.DirectByteBuffer.<init>(long, int): unavailable
12:07:18.545 [main] DEBUG i.n.util.internal.PlatformDependent - sun.misc.Unsafe: available
12:07:18.559 [main] DEBUG i.n.util.internal.PlatformDependent - maxDirectMemory: 4106223616 bytes (maybe)
12:07:18.560 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.tmpdir: /tmp (java.io.tmpdir)
12:07:18.560 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.bitMode: 64 (sun.arch.data.model)
12:07:18.561 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.maxDirectMemory: -1 bytes
12:07:18.562 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.uninitializedArrayAllocationThreshold: -1
12:07:18.563 [main] DEBUG io.netty.util.internal.CleanerJava9 - java.nio.ByteBuffer.cleaner(): available
12:07:18.563 [main] DEBUG i.n.util.internal.PlatformDependent - -Dio.netty.noPreferDirect: false
12:07:18.577 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.level: simple
12:07:18.577 [main] DEBUG io.netty.util.ResourceLeakDetector - -Dio.netty.leakDetection.targetRecords: 4
12:07:18.598 [main] DEBUG i.n.c.MultithreadEventLoopGroup - -Dio.netty.eventLoopThreads: 16
12:07:18.615 [main] DEBUG i.n.u.i.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024
12:07:18.615 [main] DEBUG i.n.u.i.InternalThreadLocalMap - -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096
12:07:18.621 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.noKeySetOptimization: false
12:07:18.621 [main] DEBUG io.netty.channel.nio.NioEventLoop - -Dio.netty.selectorAutoRebuildThreshold: 512
12:07:18.628 [main] DEBUG i.n.util.internal.PlatformDependent - org.jctools-core.MpscChunkedArrayQueue: available
12:07:18.677 [main] DEBUG i.n.r.d.DefaultDnsServerAddressStreamProvider - Default DNS servers: [/127.0.0.53:53] (sun.net.dns.ResolverConfiguration)
12:07:18.693 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv4Stack: false
12:07:18.693 [main] DEBUG io.netty.util.NetUtil - -Djava.net.preferIPv6Addresses: false
12:07:18.695 [main] DEBUG i.netty.util.NetUtilInitializations - Loopback interface: lo (lo, 0:0:0:0:0:0:0:1%lo)
12:07:18.696 [main] DEBUG io.netty.util.NetUtil - /proc/sys/net/core/somaxconn: 4096
12:07:18.706 [main] DEBUG i.n.r.DefaultHostsFileEntriesResolver - -Dio.netty.hostsFileRefreshInterval: 0
12:07:19.005 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numHeapArenas: 16
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.numDirectArenas: 16
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.pageSize: 8192
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxOrder: 9
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.chunkSize: 4194304
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.smallCacheSize: 256
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.normalCacheSize: 64
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxCachedBufferCapacity: 32768
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.cacheTrimInterval: 8192
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.cacheTrimIntervalMillis: 0
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.useCacheForAllThreads: false
12:07:19.006 [vert.x-eventloop-thread-1] DEBUG i.n.buffer.PooledByteBufAllocator - -Dio.netty.allocator.maxCachedByteBuffersPerChunk: 1023
12:07:19.024 [vert.x-eventloop-thread-1] DEBUG io.netty.buffer.AbstractByteBuf - -Dio.netty.buffer.checkAccessible: true
12:07:19.025 [vert.x-eventloop-thread-1] DEBUG io.netty.buffer.AbstractByteBuf - -Dio.netty.buffer.checkBounds: true
12:07:19.026 [vert.x-eventloop-thread-1] DEBUG i.n.util.ResourceLeakDetectorFactory - Loaded default ResourceLeakDetector: io.netty.util.ResourceLeakDetector@60d1ff51
12:07:19.273 [vert.x-eventloop-thread-1] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.allocator.type: pooled
12:07:19.274 [vert.x-eventloop-thread-1] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.threadLocalDirectBufferSize: 0
12:07:19.274 [vert.x-eventloop-thread-1] DEBUG io.netty.buffer.ByteBufUtil - -Dio.netty.maxThreadLocalCharBufferSize: 16384
12:07:19.361 [vert.x-eventloop-thread-0] ERROR i.v.c.i.l.c.VertxIsolatedDeployer - Failed in deploying verticle
java.lang.IllegalArgumentException: null
	at io.vertx.core.net.impl.transport.Transport.serverChannelFactory(Transport.java:194)
	at io.vertx.core.net.impl.AsyncResolveConnectHelper.doBind(AsyncResolveConnectHelper.java:37)
	at io.vertx.core.net.impl.TCPServerBase.lambda$listen$2(TCPServerBase.java:168)
	at io.vertx.core.impl.future.FutureImpl$3.onSuccess(FutureImpl.java:141)
	at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:60)
	at io.vertx.core.impl.future.FutureImpl.addListener(FutureImpl.java:196)
	at io.vertx.core.impl.future.PromiseImpl.addListener(PromiseImpl.java:23)
	at io.vertx.core.impl.future.FutureImpl.onComplete(FutureImpl.java:164)
	at io.vertx.core.impl.future.PromiseImpl.onComplete(PromiseImpl.java:23)
	at io.vertx.core.net.impl.TCPServerBase.listen(TCPServerBase.java:151)
	at io.vertx.core.net.impl.TCPServerBase.bind(TCPServerBase.java:94)
	at io.vertx.core.http.impl.HttpServerImpl.listen(HttpServerImpl.java:215)
	at io.vertx.core.http.impl.HttpServerImpl.listen(HttpServerImpl.java:228)
	at io.kroki.server.Server.start(Server.java:162)
	at io.kroki.server.Server.lambda$start$1(Server.java:69)
	at io.vertx.core.impl.future.FutureImpl$3.onSuccess(FutureImpl.java:141)
	at io.vertx.core.impl.future.FutureBase.emitSuccess(FutureBase.java:60)
	at io.vertx.core.impl.future.FutureImpl.addListener(FutureImpl.java:196)
	at io.vertx.core.impl.future.FutureImpl.onComplete(FutureImpl.java:164)
	at io.vertx.config.impl.ConfigRetrieverImpl.getConfig(ConfigRetrieverImpl.java:175)
	at io.kroki.server.Server.start(Server.java:65)
	at io.vertx.core.impl.DeploymentManager.lambda$doDeploy$5(DeploymentManager.java:196)
	at io.vertx.core.impl.ContextInternal.dispatch(ContextInternal.java:264)
	at io.vertx.core.impl.ContextInternal.dispatch(ContextInternal.java:246)
	at io.vertx.core.impl.EventLoopContext.lambda$runOnContext$0(EventLoopContext.java:43)
	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:829)

[ggrossetie]

I think we need to add native transports (jar dependencies): https://netty.io/wiki/native-transports.html

https://vertx.io/blog/eclipse-vert-x-3-5-0-released/#native-transport-and-domain-sockets