Hello,
yes i have "stuck threads".
some info from server log file is given below.
[memory ][Fri Jul 27 07:39:06 2012][14584] Running with 32 bit heap and compressed references.
[memory ][Fri Jul 27 07:39:06 2012][14584] GC mode: Static, strategy: Generational Concurrent Mark & Sweep
[memory ][Fri Jul 27 07:39:06 2012][14584] heap size: 262144K, maximal heap size: 262144K, nursery size: 20480K
[memory ][Fri Jul 27 07:40:19 2012][14584] 73.773: parallel nursery GC 208128K->194934K (262144K), 20.880 ms
[memory ][Fri Jul 27 07:47:37 2012][14584] 511.476: parallel nursery GC 212703K->199886K (262144K), 32.796 ms
[memory ][Fri Jul 27 08:02:35 2012][14584] 1409.681: parallel nursery GC 219094K->204649K (262144K), 18.209 ms
[memory ][Fri Jul 27 08:17:45 2012][14584] 2319.085: parallel nursery GC 223928K->209426K (262144K), 25.542 ms
[memory ][Fri Jul 27 08:33:00 2012][14584] 3234.777: parallel nursery GC 228729K->214308K (262144K), 20.352 ms
[memory ][Fri Jul 27 08:45:45 2012][14584] 3999.108-3999.268: GC 231623K->49511K (262144K), sum of pauses 61.412 ms
[memory ][Fri Jul 27 08:48:27 2012][14584] 4161.287: parallel nursery GC 74194K->60193K (262144K), 20.991 ms
[memory ][Fri Jul 27 08:48:27 2012][14584] 4161.555: parallel nursery GC 78420K->64161K (262144K), 15.837 ms
[memory ][Fri Jul 27 08:48:27 2012][14584] 4161.690: parallel nursery GC 81024K->66971K (262144K), 44.633 ms
[memory ][Fri Jul 27 08:48:27 2012][14584] 4161.856: parallel nursery GC 84048K->70809K (262144K), 21.316 ms
[memory ][Fri Jul 27 08:48:28 2012][14584] 4162.010: parallel nursery GC 88571K->75236K (262144K), 22.431 ms
[memory ][Fri Jul 27 08:48:28 2012][14584] 4162.601: parallel nursery GC 91544K->78578K (262144K), 24.977 ms
Regards.