query: java.lang.NullPointerException on MyFirebaseInstanceIDService only some times
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 73034
negative_passages.text: StringBuilder append() and null values
negative_passages.docid: 113199
negative_passages.text: @OneToOne(optional=false) and @JoinColumn(nullable=false) used together
negative_passages.docid: 63430
negative_passages.text: attempt to re-open an already-closed object: SQLiteDatabase
negative_passages.docid: 55274
negative_passages.text: Java: Exception itself is null
negative_passages.docid: 20020
negative_passages.text: NullPointerException accessing views in onCreate()
negative_passages.docid: 64695
negative_passages.text: onDestroy() - to set or not to set instance variables to null?
negative_passages.docid: 9396
negative_passages.text: NullPointerException on AlarmManager.setRepeating() - ElapsedRealTime - Android
negative_passages.docid: 87189
negative_passages.text: System.NullPointerException
negative_passages.docid: 117611
negative_passages.text: Android Context.bindService always returns false and ServiceConnection object is never triggered
negative_passages.docid: 128142
negative_passages.text: java.lang.NullPointerException at org.apache.jsp.foo_jsp._jspInit(foo_jsp.java:22)
negative_passages.docid: 92797
negative_passages.text: How to debug NullPointerException in selenium-java
negative_passages.docid: 106244
negative_passages.text: Why do I get java.lang.AbstractMethodError when trying to load a blob in the db?
negative_passages.docid: 10581
negative_passages.text: Avoiding NullPointerException in Java
negative_passages.docid: 40660
negative_passages.text: Handle null value using Guava MapMaker/CacheBuilder
negative_passages.docid: 22952
negative_passages.text: How to fix the Hibernate "object references an unsaved transient instance - save the transient instance before flushing" error
negative_passages.docid: 119573
negative_passages.text: NullPointerException in Java with no StackTrace