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Failed to parse node with class class bookjobs.bookjobs.BookController$UploadBookTask$1
com.google.firebase.database.DatabaseException: Failed to parse node with class class bookjobs.bookjobs.BookController$UploadBookTask$1	at com.google.android.gms.internal.zzakk.zza(Unknown Source)	at com.google.android.gms.internal.zzakk.zzbq(Unknown Source)	at com.google.android.gms.internal.zzakn.zzbr(Unknown Source)	at com.google.firebase.database.DatabaseReference.setValue(Unknown Source)	at bookjobs.bookjobs.BookController$UploadBookTask.doInBackground(BookController.java:59)	at bookjobs.bookjobs.BookController$UploadBookTask.doInBackground(BookController.java:30)	at android.os.AsyncTask$2.call(AsyncTask.java:295)	at java.util.concurrent.FutureTask.run(FutureTask.java:237)	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)	at java.lang.Thread.run(Thread.java:818)