facebook/fresco

Fatal Exception: java.lang.NullPointerException: Attempt to get length of null array

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Aperta il 26 mag 2020

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 (15 commenti) (0 reazioni) (0 assegnatari)Java (17.072 star) (3750 fork)batch import
buggood first issuehelp wanted

Descrizione

We are getting following crash on Crashlytics for good number of users with Android OS 8, with more than 47 devices. We are using "com.facebook.fresco:fresco:2.2.0"

Could you please help us, since its happening on. multiple users.

Logs :

Fatal Exception: java.lang.NullPointerException: Attempt to get length of null array at java.util.Formatter$FormatSpecifier.addZeros(Formatter.java:3505) at java.util.Formatter$FormatSpecifier.print(Formatter.java:3401) at java.util.Formatter$FormatSpecifier.print(Formatter.java:3332) at java.util.Formatter$FormatSpecifier.print(Formatter.java:3317) at java.util.Formatter$FormatSpecifier.printFloat(Formatter.java:2891) at java.util.Formatter$FormatSpecifier.print(Formatter.java:2844) at java.util.Formatter.format(Formatter.java:2523) at java.util.Formatter.format(Formatter.java:2458) at java.lang.String.format(String.java:2814) at com.facebook.common.logging.FLog.formatString(FLog.java:491) at com.facebook.common.logging.FLog.v(FLog.java:118) at com.facebook.imagepipeline.transcoder.DownsampleUtil.determineDownsampleRatio(DownsampleUtil.java:87) at com.facebook.imagepipeline.transcoder.DownsampleUtil.determineSampleSize(DownsampleUtil.java:43) at com.facebook.imagepipeline.producers.DecodeProducer$ProgressiveDecoder$1.run(DecodeProducer.java:163) at com.facebook.imagepipeline.producers.JobScheduler.doJob(JobScheduler.java:202) at com.facebook.imagepipeline.producers.JobScheduler.access$000(JobScheduler.java:22) at com.facebook.imagepipeline.producers.JobScheduler$1.run(JobScheduler.java:73) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) at com.facebook.imagepipeline.core.PriorityThreadFactory$1.run(PriorityThreadFactory.java:51) at java.lang.Thread.run(Thread.java:764)

Guida contributor

Tech stack
java
Dominio
mobile
Tipo issue
bug
DifficoltàQuanto dovrebbe essere impegnativa per un nuovo contributor.
3
Tempo stimatoTempo stimato per completare e verificare uno scope piccolo.
half day
Stato attivitàQuanto è probabile che la issue sia ancora attiva e reviewable.
stale
ChiarezzaQuanto chiaramente la issue descrive problema, scope e risultato atteso.
needs investigation
Prerequisiti
basic JavaAndroid logging
Adatta ai principiantiQuanto la issue è adatta a contributor alla prima esperienza.
30
Direzione di ricerca
The stack trace points to a NullPointerException in `java.util.Formatter$FormatSpecifier.addZeros` called from `FLog.formatString` at line 491. The crash occurs in `DownsampleUtil.determineDownsampleRatio` (line 87) and `DecodeProducer$ProgressiveDecoder$1.run` (line 163). Investigate the `FLog.formatString` method in the Fresco codebase to identify why a null array is passed to `String.format`. Check if there is a missing null check for the format arguments. Additionally, review the `DownsampleUtil` class to understand the context in which the logging is invoked. The issue is reproducible on Android 8 across many devices; consider testing with an emulator running API 26. Look at the existing comments in issue #2504 for any further hints from maintainers.