Invalid request: filter not found

[smile-vi]

Issue_title

After several minutes, Invalid Request: filter not found is displayed

Issue_description

An exception occurred a few minutes later

Issue_context

05:31:55.546 [pool-2-thread-2] ERROR org.web3j.protocol.core.filters.Filter - Error sending request
org.web3j.protocol.core.filters.FilterException: Invalid request: filter not found
	at org.web3j.protocol.core.filters.Filter.throwException(Filter.java:194)
	at org.web3j.protocol.core.filters.Filter.getInitialFilterLogs(Filter.java:120)
	at org.web3j.protocol.core.filters.Filter.run(Filter.java:69)
	at org.web3j.protocol.core.filters.Filter.reinstallFilter(Filter.java:159)
	at org.web3j.protocol.core.filters.Filter.pollFilter(Filter.java:141)
	at org.web3j.protocol.core.filters.Filter.lambda$run$0(Filter.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

[Xilis]

Most likely solved in https://github.com/web3j/web3j/pull/1679