Enabling minifi on android causes classCast Exeption

Riproduci il problema con l’app OpenMobileNetworkToolkit rimuovendo la com.influxdb.** ProGuard keep rule ed eseguendo una build Android minificata. Inizia con AbstractInfluxDBClient e InfluxDBClientFactory nello stack trace, quindi traccia la chiamata da InfluxdbConnection attraverso LoggingService. Il lavoro è completato quando sia la build minificata sia quella non minificata evitano la ClassCastException senza richiedere questa keep rule.

Steps to reproduce:
List the minimal actions needed to reproduce the behavior.

I not sure how to reproduce this in a general way. In our android application https://github.com/omnt/OpenMobileNetworkToolkit the issues occures when minifiing is anabled.
As a workarround i added

-keep class com.influxdb.**

to the proguard rules. Im not entierly sure if the problem is no caused by our code but at least disabling the minifing for the influx lib solves the isse.

1. clone omnt git
2. remove the pro guard rule -keep class com.influxdb.** (if already included in the code version)
3. run the app and at random strings an url in settings -> logging -> remote influxDB
4. enable logging
5. restart the app (probably optional as it probably will crash

altetnativ the 0.2 release APK from the github page results in the same issue but is probably not helpfull for debugging

Expected behavior:
Same behavior of normal and minified build

Actual behavior:
minfied build causes an exeption

 de....okus.OpenMobileNetworkToolkit  E  FATAL EXCEPTION: main                                                                                                   Process: de.fraunhofer.fokus.OpenMobileNetworkToolkit, PID: 12351
                                                                                                    java.lang.RuntimeException: Unable to start service de.fraunhofer.fokus.OpenMobileNetworkToolkit.LoggingService@f51d1f4 with Intent { cmp=de.fraunhofer.fokus.OpenMobileNetworkToolkit/.LoggingService }: java.lang.ClassCastException
                                                                                                    	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4839)
                                                                                                    	at android.app.ActivityThread.-$$Nest$mhandleServiceArgs(Unknown Source:0)
                                                                                                    	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2289)
                                                                                                    	at android.os.Handler.dispatchMessage(Handler.java:106)
                                                                                                    	at android.os.Looper.loopOnce(Looper.java:205)
                                                                                                    	at android.os.Looper.loop(Looper.java:294)
                                                                                                    	at android.app.ActivityThread.main(ActivityThread.java:8177)
                                                                                                    	at java.lang.reflect.Method.invoke(Native Method)
                                                                                                    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
                                                                                                    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)
                                                                                                    Caused by: java.lang.ClassCastException
                                                                                                    	at androidx.appcompat.app.ToolbarActionBar$$ExternalSyntheticThrowCCEIfNotNull0.m(R8$$SyntheticClass:0)
                                                                                                    	at com.influxdb.client.internal.AbstractInfluxDBClient.<init>(AbstractInfluxDBClient.java:126)
                                                                                                    	at com.influxdb.client.internal.AbstractInfluxDBClient.<init>(AbstractInfluxDBClient.java:79)
                                                                                                    	at com.influxdb.client.internal.InfluxDBClientImpl.<init>(InfluxDBClientImpl.java:99)
                                                                                                    	at com.influxdb.client.InfluxDBClientFactory.create(InfluxDBClientFactory.java:261)
                                                                                                    	at com.influxdb.client.InfluxDBClientFactory.create(InfluxDBClientFactory.java:180)
                                                                                                    	at de.fraunhofer.fokus.OpenMobileNetworkToolkit.InfluxDB2x.InfluxdbConnection.<init>(InfluxdbConnection.java:57)
                                                                                                    	at de.fraunhofer.fokus.OpenMobileNetworkToolkit.InfluxDB2x.InfluxdbConnections.getRicInstance(InfluxdbConnections.java:43)
                                                                                                    	at de.fraunhofer.fokus.OpenMobileNetworkToolkit.LoggingService.setupRemoteInfluxDB(LoggingService.java:513)
                                                                                                    	at de.fraunhofer.fokus.OpenMobileNetworkToolkit.LoggingService.onStartCommand(LoggingService.java:314)
                                                                                                    	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4821)
                                                                                                    	at android.app.ActivityThread.-$$Nest$mhandleServiceArgs(Unknown Source:0) 
                                                                                                    	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2289) 
                                                                                                    	at android.os.Handler.dispatchMessage(Handler.java:106) 
                                                                                                    	at android.os.Looper.loopOnce(Looper.java:205) 
                                                                                                    	at android.os.Looper.loop(Looper.java:294) 
                                                                                                    	at android.app.ActivityThread.main(ActivityThread.java:8177) 
                                                                                                    	at java.lang.reflect.Method.invoke(Native Method) 
                                                                                                    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552) 
                                                                                                    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971) 

Specifications:

• Client Version: 7.0.0 and 7.1.0 not sure about older versions
• InfluxDB Version: 2.x but issue happens also if no connection is possible
• JDK Version: java 11
• Platform: Android