Receiving "Connection Already Closed Error on Creating Producer"

Expected behavior

I would expect the client to connect and build, or give a more useful error.

Actual behavior

When attempting to create the producer, I receive this error:

Exception in thread "main" org.apache.pulsar.client.api.PulsarClientException: Connection already closed
	at org.apache.pulsar.client.impl.ClientCnx.channelInactive(ClientCnx.java:169)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224)
	at org.apache.pulsar.shade.io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:377)
	at org.apache.pulsar.shade.io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:342)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224)
	at org.apache.pulsar.shade.io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1409)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
	at org.apache.pulsar.shade.io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:927)
	at org.apache.pulsar.shade.io.netty.channel.AbstractChannel$AbstractUnsafe$8.run(AbstractChannel.java:822)
	at org.apache.pulsar.shade.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
	at org.apache.pulsar.shade.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
	at org.apache.pulsar.shade.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463)
	at org.apache.pulsar.shade.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
	at org.apache.pulsar.shade.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)

Steps to reproduce

We are not able to reproduce this issue with the python library. Here is the java code:

messageBus = PulsarClient.builder()
                .serviceUrl(messageBusUrl)
                .tlsTrustCertsFilePath("/Users/josh/Documents/myriadmobile/kernel/translator-mono/core/src/main/resources/pulsar-ca-cert.pem")
                .authentication("org.apache.pulsar.client.impl.auth.AuthenticationTls",
                        "tlsCertFile:/Users/josh/Documents/myriadmobile/kernel/translator-mono/core/src/main/resources/pulsar-public.pem,tlsKeyFile:/Users/josh/Documents/myriadmobile/kernel/translator-mono/core/src/main/resources/pulsar-private.pem")
                .build()

System configuration

This was originally encountered with 2.0.1-incubating (as referenced for the import in the java client import), and also persists in 2.1.0 and 2.1.1

[gurgen2727]

I have the same issue running for Python version 2, pulsar version 2.4.0. Ubuntu 18.04.2 LTS (Bionic Beaver) running under Virtual Box in Windows 10

import pulsar client = pulsar.Client(‘pulsar://localhost:6650’) producer = client.create_producer(‘my-topic’) producer.send(“testing”) client.close()

2019-07-16 18:19:47.192 INFO ConnectionPool:72 | Created connection for pulsar://localhost:6650 2019-07-16 18:19:47.193 ERROR ClientConnection:360 | [ -> pulsar://localhost:6650] Failed to establish connection: Connection refused 2019-07-16 18:19:47.193 INFO ClientConnection:1297 | [ -> pulsar://localhost:6650] Connection closed 2019-07-16 18:19:47.193 ERROR ClientImpl:182 | Error Checking/Getting Partition Metadata while creating producer on persistent://public/default/my-topic – 5 2019-07-16 18:19:47.193 INFO ClientImpl:482 | Closing Pulsar client Traceback (most recent call last): producer = client.create_producer(‘my-topic’) File “/usr/local/lib/python2.7/dist-packages/pulsar/init.py”, line 476, in create_producer p._producer = self._client.create_producer(topic, conf) Exception: Pulsar error: ConnectError 2019-07-16 18:19:47.200 INFO ClientConnection:222 | [ -> pulsar://localhost:6650] Destroyed connection

changing ‘pulsar://localhost:6650’ -> ‘http://<local_ip>:6650’ doesn’t work either. I am really confused with this library.

[a1onzo]

hi, is the issue above solved? i am confused with that error “Error Checking/Getting Partition Metadata while creating producer” too @gurgen2727