SocketTimeoutException on NiFi startup

[novakov-alexey-zz]

Describe the bug
NiFi cluster does not start normally, so that NiFi UI opens with an error:

app-log has such exception thrown infinitely:

 java.net.SocketTimeoutException: timeout                                                                                                                                                                                                        at okio.Okio$4.newTimeoutException(Okio.java:232)
     at okio.AsyncTimeout.exit(AsyncTimeout.java:286)                                                                                                                                                                                            at okio.AsyncTimeout$2.read(AsyncTimeout.java:241)
     at okio.RealBufferedSource.indexOf(RealBufferedSource.java:358)                                                                                                                                                                             at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:230)
     at okhttp3.internal.http1.Http1ExchangeCodec.readHeaderLine(Http1ExchangeCodec.java:242)                                                                                                                                                    at okhttp3.internal.http1.Http1ExchangeCodec.readResponseHeaders(Http1ExchangeCodec.java:213)
     at okhttp3.internal.connection.Exchange.readResponseHeaders(Exchange.java:115)                                                                                                                                                              at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:94)
     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)                                                                                                                                                        at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:43)
     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)                                                                                                                                                        at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
     at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:94)                                                                                                                                                              at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)                                                                                                                                                        at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
     at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:88)
     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:142)
     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:117)
     at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:229)
     at okhttp3.RealCall.execute(RealCall.java:81)
     at org.apache.nifi.cluster.coordination.http.replication.okhttp.OkHttpReplicationClient.replicate(OkHttpReplicationClient.java:132)
     at org.apache.nifi.cluster.coordination.http.replication.okhttp.OkHttpReplicationClient.replicate(OkHttpReplicationClient.java:126)
     at org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator.replicateRequest(ThreadPoolRequestReplicator.java:647)
     at org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator$NodeHttpRequest.run(ThreadPoolRequestReplicator.java:839)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
     at java.util.concurrent.FutureTask.run(FutureTask.java:266)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
     at java.lang.Thread.run(Thread.java:748)
 Caused by: java.net.SocketException: Socket closed
     at java.net.SocketInputStream.read(SocketInputStream.java:204)
     at java.net.SocketInputStream.read(SocketInputStream.java:141)
     at okio.Okio$2.read(Okio.java:140)
     at okio.AsyncTimeout$2.read(AsyncTimeout.java:237)
     ... 29 common frames omitted

Version of Helm and Kubernetes:
Helm charts v0.6.1
Kubernetes v1.18.8

What happened:
NiFi does not work. NiFi UI shows such error:

An unexpected error has occurred
home
{ "servlet":"jerseySpring", "message":"Service Unavailable", "url":"/nifi-api/flow/process-groups/root", "status":"503" }

What you expected to happen:
Cluster is formed. NiFi UI can be opened.

How to reproduce it (as minimally and precisely as possible):
Deploy with Helm charts 0.6.1 version

helm install nifi cetic/nifi --version 0.6.1

Anything else we need to know:
Helm chart 0.6.0 are working fine.

[novakov-alexey-zz]

Any feedback on this issue? Does anybody use the latest Helm charts version 0.6.1?

[tunaman]

Yeah same as issue #115. That one has a good description of what's causing this

[patsevanton]

Hello! Same issue.

[AyadiAmen]

#126