influxdata / influxdata/influxdb-client-java
Enabling minifi on android causes classCast Exeption
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- Java
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Description
__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$$SyntheticClass:0)
at com.influxdb.client.internal.AbstractInfluxDBClient.(AbstractInfluxDBClient.java:126)
at com.influxdb.client.internal.AbstractInfluxDBClient.(AbstractInfluxDBClient.java:79)
at com.influxdb.client.internal.InfluxDBClientImpl.(InfluxDBClientImpl.java:99)
at com.influxdb.client.InfluxDBClientFactory.create(InfluxDBClientFactory.java:261)
at com.influxdb.client.InfluxDBClientFactory.create(InfluxDBClientFactory.java:180)
at de.fraunhofer.fokus.OpenMobileNetworkToolkit.InfluxDB2x.InfluxdbConnection.(InfluxdbConnection.java:57)
at de.fraunhofer.fokus.OpenMobileNetworkToolkit.InfluxDB2x.InfluxdbConnections.getRicInstance(InfluxdbConnections.java:43)
at de.fraunhofer.fokus.OpenMobileNetworkToolkit.LoggingService.setupRemoteInfluxDB(LoggingService.java:513)
at de.fraunhofer.fokus.OpenMobileNetworkToolkit.LoggingService.onStartCommand(LoggingService.java:314)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4821)
at android.app.ActivityThread.-$$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
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Research direction
Reproduce with the OpenMobileNetworkToolkit app by removing the com.influxdb.** ProGuard keep rule and running a minified Android build. Start with AbstractInfluxDBClient and InfluxDBClientFactory in the stack trace, then trace the call from InfluxdbConnection through LoggingService. Done means the minified and non-minified builds avoid the ClassCastException without requiring that keep rule.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, java
- Domain
- mobile-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100