GC_FOR_ALLOC freed issue in Android App

GC_FOR_ALLOC freed issue in Android App

I have problems with GC_FOR_ALLOC freed. I am not sure how to debug upon
this issue. The LogCat infos are as shown below. How can I solve this
problem?
08-24 17:15:51.145: D/dalvikvm(23287): WAIT_FOR_CONCURRENT_GC blocked 11ms
08-24 17:15:51.160: D/dalvikvm(23287): GC_FOR_ALLOC freed 1009K, 30% free
20176K/28487K, paused 14ms, total 14ms
08-24 17:15:52.520: D/dalvikvm(23287): GC_FOR_ALLOC freed 5170K, 42% free
16694K/28487K, paused 14ms, total 14ms
08-24 17:15:52.550: D/dalvikvm(23287): GC_FOR_ALLOC freed <1K, 37% free
17971K/28487K, paused 14ms, total 14ms
08-24 17:15:52.555: I/dalvikvm-heap(23287): Grow heap (frag case) to
20.322MB for 2325052-byte allocation
08-24 17:15:52.580: D/dalvikvm(23287): GC_CONCURRENT freed 0K, 29% free
20241K/28487K, paused 12ms+2ms, total 27ms
08-24 17:15:52.580: D/dalvikvm(23287): WAIT_FOR_CONCURRENT_GC blocked 11ms
08-24 17:15:52.600: D/dalvikvm(23287): GC_FOR_ALLOC freed 1277K, 28% free
20652K/28487K, paused 14ms, total 14ms
08-24 17:15:56.090: D/dalvikvm(23287): GC_FOR_ALLOC freed 5646K, 42% free
16694K/28487K, paused 14ms, total 14ms
08-24 17:15:56.120: D/dalvikvm(23287): GC_FOR_ALLOC freed <1K, 37% free
17971K/28487K, paused 15ms, total 15ms
08-24 17:15:56.120: I/dalvikvm-heap(23287): Grow heap (frag case) to
20.322MB for 2325052-byte allocation
08-24 17:15:56.150: D/dalvikvm(23287): GC_CONCURRENT freed 0K, 29% free
20241K/28487K, paused 12ms+2ms, total 28ms
08-24 17:15:56.150: D/dalvikvm(23287): WAIT_FOR_CONCURRENT_GC blocked 11ms
08-24 17:15:56.170: D/dalvikvm(23287): GC_FOR_ALLOC freed 1277K, 28% free
20652K/28487K, paused 14ms, total 15ms
08-24 17:15:57.520: D/dalvikvm(23287): GC_FOR_ALLOC freed 5646K, 42% free
16694K/28487K, paused 14ms, total 14ms
08-24 17:15:57.555: D/dalvikvm(23287): GC_FOR_ALLOC freed <1K, 40% free
17274K/28487K, paused 15ms, total 15ms
08-24 17:15:57.570: D/dalvikvm(23287): GC_FOR_ALLOC freed 580K, 38% free
17725K/28487K, paused 15ms, total 15ms
08-24 17:15:57.590: D/dalvikvm(23287): GC_FOR_ALLOC freed <1K, 32% free
19413K/28487K, paused 14ms, total 14ms
08-24 17:16:01.090: D/dalvikvm(23287): GC_FOR_ALLOC freed 4407K, 42% free
16694K/28487K, paused 13ms, total 13ms
08-24 17:16:01.120: D/dalvikvm(23287): GC_FOR_ALLOC freed <1K, 40% free
17273K/28487K, paused 14ms, total 14ms
08-24 17:16:01.140: D/dalvikvm(23287): GC_FOR_ALLOC freed 580K, 38% free
17725K/28487K, paused 13ms, total 13ms
08-24 17:16:01.160: D/dalvikvm(23287): GC_FOR_ALLOC freed <1K, 32% free
19413K/28487K, paused 15ms, total 15ms
08-24 17:16:02.230: I/Process(23287): Sending signal. PID: 23287 SIG: 9