[Defy Android Development] YetAnotherForumUser:
Four RTC_WAKEUP events scheduled at exactly the same time (when=+2h59m17s902ms), for the same program. Given the source of this bug I should probably say 'only four RTC_WAKEUP events scheduled' - my phone currently has 54 of these scheduled to go off:

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RTC_WAKEUP #56: Alarm{4116d240 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e725e0: PendingIntentRecord{4116d178 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #55: Alarm{40e64ed8 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e64ec8: PendingIntentRecord{40e64dd8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #54: Alarm{40e34400 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40eb54b8: PendingIntentRecord{40e49208 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #53: Alarm{40e239c0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e239b0: PendingIntentRecord{40e238c0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #52: Alarm{40d15aa0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40df8b20: PendingIntentRecord{41242fd8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #51: Alarm{40e62a18 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e6cdd8: PendingIntentRecord{40e62888 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #50: Alarm{41347ef0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41257018: PendingIntentRecord{41347e00 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #49: Alarm{41352d78 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{413eb620: PendingIntentRecord{41352c88 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #48: Alarm{41505da8 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{4104f910: PendingIntentRecord{41505c68 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #47: Alarm{4152ad98 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{414f9180: PendingIntentRecord{4152aca8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #46: Alarm{40ea0990 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{412aa8f0: PendingIntentRecord{40ea08a0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #45: Alarm{41519448 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41180b90: PendingIntentRecord{412ac2e8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #44: Alarm{40dd2c68 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40fff250: PendingIntentRecord{40dd2bc8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #43: Alarm{40fe9f10 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{414e5610: PendingIntentRecord{40fe9e20 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #42: Alarm{414fc4c0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41109738: PendingIntentRecord{414fc3d0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #41: Alarm{412b45d8 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{413eba98: PendingIntentRecord{413542d8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #40: Alarm{413c1e70 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41242c40: PendingIntentRecord{40f4e498 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #39: Alarm{40dd5448 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40df88b0: PendingIntentRecord{40df8810 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #38: Alarm{413d5298 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{4174c6e0: PendingIntentRecord{413d51f8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #37: Alarm{40de0968 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{413a9768: PendingIntentRecord{410b52f8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #36: Alarm{4163e8f8 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{4163e8e8: PendingIntentRecord{4163e7e0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #35: Alarm{411ac038 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41439b18: PendingIntentRecord{412a3610 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #34: Alarm{40e372f0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e71918: PendingIntentRecord{40e43d60 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #33: Alarm{414bc210 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40d64890: PendingIntentRecord{414bc170 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #32: Alarm{410e3018 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{414e0340: PendingIntentRecord{41297ae8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #31: Alarm{40ef5d58 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{4119e8d0: PendingIntentRecord{40ef65c0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #30: Alarm{40d587b0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40d4fb50: PendingIntentRecord{40d58710 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #29: Alarm{40cf7cd0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40d30568: PendingIntentRecord{40d197b8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #28: Alarm{40ef6c00 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40f14e70: PendingIntentRecord{40efcef0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #27: Alarm{413be258 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{413be248: PendingIntentRecord{413be1a8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #26: Alarm{4110a7d8 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{4110c598: PendingIntentRecord{4110c560 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #25: Alarm{40dec280 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40deef08: PendingIntentRecord{40e00348 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #24: Alarm{41493b40 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40d62c48: PendingIntentRecord{40e64550 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #23: Alarm{40f034c0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40f034b0: PendingIntentRecord{40f033c0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #22: Alarm{40ea65c0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{411aaf68: PendingIntentRecord{40ecb7f8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #21: Alarm{4134b9e0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40dc11e0: PendingIntentRecord{4130eea8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #20: Alarm{40d53108 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40d755b8: PendingIntentRecord{40d73960 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #19: Alarm{41746530 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40eca708: PendingIntentRecord{41746440 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #18: Alarm{40e082b8 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40dbc7e8: PendingIntentRecord{40dbc788 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #17: Alarm{40dd42b0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e07520: PendingIntentRecord{40de0198 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #16: Alarm{416d1220 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41153f40: PendingIntentRecord{416d1130 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #15: Alarm{4137f2e0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40f5ac30: PendingIntentRecord{4137f240 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #14: Alarm{40e356d0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{414dc0d0: PendingIntentRecord{40e35658 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #13: Alarm{40e7dda0 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40ea0410: PendingIntentRecord{40e9d740 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #12: Alarm{40e6ec80 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41253db0: PendingIntentRecord{40e6eb40 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #11: Alarm{41517d40 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e3f890: PendingIntentRecord{41517c50 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #10: Alarm{40de0b48 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{410e3798: PendingIntentRecord{40de0a58 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #9: Alarm{414edd10 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40dd9c68: PendingIntentRecord{4143f9e0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #8: Alarm{41279628 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{41179f88: PendingIntentRecord{41243dd0 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #7: Alarm{41502bd8 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e32700: PendingIntentRecord{414d3ff8 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #6: Alarm{40fe6928 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{4104d640: PendingIntentRecord{40fff318 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #5: Alarm{414d5100 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40e08760: PendingIntentRecord{414d5010 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #4: Alarm{40d7e478 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40d7e468: PendingIntentRecord{40d7e378 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #3: Alarm{41358c30 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{40d7ebb8: PendingIntentRecord{41313b80 com.android.deskclock broadcastIntent}}
RTC_WAKEUP #2: Alarm{4128ec40 type 0 com.android.deskclock}
type=0 when=+8h27m13s613ms repeatInterval=0 count=0
operation=PendingIntent{410215c0: PendingIntentRecord{4128eb50 com.android.deskclock broadcastIntent}}
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It is clear that this bug has not been patched yet, even though I submitted a patch about two months ago. As to whether this is the root cause of the alarm failing to go off sometimes remains to be seen but it should be clear that it would be good to fix this rather long-standing problem.