How to improve performance when pushy clients often reconnect by some disconnected Exception

[ChasonLiang]

Hi,

Our service located at BeiJing, China. The version of pusy is 0.9.2. I other encounter such Exception of "com.relayrides.pushy.apns.ClientNotConnectedException: Client disconnected unexpectedly" when sending a lot of notifications. We do not hope that our service to wait for reconnecting too much time, so I use 5 pushy clients to send notifications. If it is failed that one client sends a notification, we use another pushy client(isConnected() == true) to sent the notification again at once.

However, the solution is not good yet. It is easy that we encounter that all pushy are invalid.

Could you give me some suggestions to avoid encountering too many such exceptions, please? Or could you tell us some better usages to efficiently use pushy client?

The Exception is as following:

APNs client pipeline caught an exception. 
java.io.IOException: Connection timed out
	at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
	at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
	at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
	at sun.nio.ch.IOUtil.read(IOUtil.java:192)
	at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
	at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:288)
	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1100)
	at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:366)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:118)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:651)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:574)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:488)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:450)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873)
	at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
	at java.lang.Thread.run(Thread.java:745)
DEBUG : 2017-04-01 15:56:26 (nioEventLoopGroup-8-1) - com.relayrides.pushy.apns.ApnsClient 
Disconnected. Next automatic reconnection attempt in 1 seconds. 
ERROR : 2017-04-01 15:56:26 (nioEventLoopGroup-8-1) - com.xinge.push.manager.PushyApnsListener 
failed to send Notification: 142276 
ERROR : 2017-04-01 15:56:26 (nioEventLoopGroup-8-1) - com.xinge.push.manager.ResponseResultListener 
Failed to send push notification using the APNs Clinet[4] 
java.util.concurrent.ExecutionException: com.relayrides.pushy.apns.ClientNotConnectedException: Client disconnected unexpectedly.
	at io.netty.util.concurrent.AbstractFuture.get(AbstractFuture.java:41)
	at com.xinge.push.manager.ResponseResultListener.operationComplete(ResponseResultListener.java:34)
	at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:514)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:507)
	at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:486)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:427)
	at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:129)
	at com.relayrides.pushy.apns.ApnsClient$3$2.run(ApnsClient.java:514)
	at io.netty.util.concurrent.PromiseTask$RunnableAdapter.call(PromiseTask.java:38)
	at io.netty.util.concurrent.PromiseTask.run(PromiseTask.java:73)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:418)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:454)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873)
	at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.relayrides.pushy.apns.ClientNotConnectedException: Client disconnected unexpectedly.
	... 9 more

Regards,
Chason

[jchambers]

This appears to be a duplicate of #433. I'm going to close this issue, but let's continue the conversation in #433.