JNI error accessed deleted global reference

04-18 16:10:20.420: I/dalvikvm(13815): JNI ERROR (app bug): accessed deleted global reference 0x1d5004ea

04-18 16:10:20.420: E/dalvikvm(13815): VM aborting
04-18 16:10:20.420: A/libc(13815): Fatal signal 6 (SIGABRT) at 0x000035f7 (code=-6), thread 13815 (rbitrarycontrol)

04-18 16:42:21.740: E/dalvikvm(15671): JNI ERROR (app bug): accessed stale global reference 0x1d300526 (index 329 in a table of size 328)

04-18 16:42:21.740: E/dalvikvm(15671): VM aborting
04-18 16:42:21.740: A/libc(15671): Fatal signal 6 (SIGABRT) at 0x00003d37 (code=-6), thread 15671 (rbitrarycontrol)

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