Following are the core dump trace , ####################################trace1 0x00000018 in ?? () #1 0x003dcc84 in Curl_llist_remove (list=0x36279938, e=0x38bb4f10, user=0x362b0188) at llist.c:116 #2 0x003dd272 in Curl_hash_clean_with_criterium (h=0x362b0188, user=0xb7dc3d50, comp=0x3be1f0 ) at hash.c:258 #3 0x003be272 in Curl_hostcache_prune (data=0x89d2578) at hostip.c:239 #4 0x003cc455 in Curl_disconnect (conn=0x372ee878) at url.c:2186 #5 0x003d07d9 in Curl_done (connp=0xb7dc3e14, status=CURLE_OPERATION_TIMEDOUT, premature=false) at url.c:4649 #6 0x003da82a in Curl_perform (data=0x89d2578) at transfer.c:2500 #7 0x003daf2b in curl_easy_perform (curl=0x89d2578) at easy.c:538 #8 0x080803cb in get_lucid_info (curl_handle=0x89d2578, url=0x3676a330 "http://qzchen.wincustomize.com/", pub_id=1045, remote_ip_addr=0xb7dd4e13 "83.109.58.51", width=728, height=90, lucid_info=0xb7dcd0d0) at ../util/lucid_util.c:309 #9 0x080805df in get_lucid_contextual_data (curl_handle=0x89d2578, url=0x3676a330 "http://qzchen.wincustomize.com/", pub_id=1045, remote_ip_addr=0xb7dd4e13 "83.109.58.51", width=728, height=90, lucid_info=0xb7dcd0d0) at ../util/lucid_util.c:384 #10 0x08071738 in cache_get_contextual_data (curl_handle=0x89d2578, cache=0xb7dd4b80, lucid_info=0xb7dcd0d0, url=0x3676a330 "http://qzchen.wincustomize.com/", site_id=1046, pub_id=1045, remote_ip_addr=0xb7dd4e13 "83.109.58.51", width=728, height=90) at ../cache/cache_contextual_data.c:64 #11 0x0804b8fa in handle_request (thread_data=0x89b5e54) at ../src/ad_server_main.c:626 #12 0x0090c3cc in start_thread () from /lib/tls/libpthread.so.0 #13 0x008771ae in clone () from /lib/tls/libc.so.6 ######################################trace 2 #0 0x007947a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2 (gdb) bt #0 0x007947a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2 #1 0x007d5815 in raise () from /lib/tls/libc.so.6 #2 0x007d7279 in abort () from /lib/tls/libc.so.6 #3 0x00809cca in __libc_message () from /lib/tls/libc.so.6 #4 0x0081055f in _int_free () from /lib/tls/libc.so.6 #5 0x0081093a in free () from /lib/tls/libc.so.6 #6 0x00b178a8 in Curl_initinfo (data=0x6) at getinfo.c:63 #7 0x00b19eb1 in Curl_pretransfer (data=0x9509698) at transfer.c:1912 #8 0x00b1a609 in Curl_perform (data=0x9509698) at transfer.c:2426 #9 0x00b1af2b in curl_easy_perform (curl=0x9509698) at easy.c:538 #10 0x080803cb in get_lucid_info (curl_handle=0x9509698, url=0x38a524a0 "http://www.dailymotion.com/related/x49qkp/video/x4a4vl_yyyy-yyyyyy-yyy-yyyyy-yyyy_creation", pub_id=16237, remote_ip_addr=0x84b56e13 "76.237.225.19", width=300, height=250, lucid_info=0x84b4f0d0) at ../util/lucid_util.c:309 #11 0x080805df in get_lucid_contextual_data (curl_handle=0x9509698, url=0x38a524a0 "http://www.dailymotion.com/related/x49qkp/video/x4a4vl_yyyy-yyyyyy-yyy-yyyyy-yyyy_creation", pub_id=16237, remote_ip_addr=0x84b56e13 "76.237.225.19", width=300, height=250, lucid_info=0x84b4f0d0) at ../util/lucid_util.c:384 #12 0x08071738 in cache_get_contextual_data (curl_handle=0x9509698, cache=0x84b56b80, lucid_info=0x84b4f0d0, url=0x38a524a0 "http://www.dailymotion.com/related/x49qkp/video/x4a4vl_yyyy-yyyyyy-yyy-yyyyy-yyyy_creation", site_id=16238, pub_id=16237, remote_ip_addr=0x84b56e13 "76.237.225.19", width=300, height=250) at ../cache/cache_contextual_data.c:64 #13 0x0804b8fa in handle_request (thread_data=0x92b7c20) at ../src/ad_server_main.c:626 #14 0x0090c3cc in start_thread () from /lib/tls/libpthread.so.0 #15 0x008771ae in clone () from /lib/tls/libc.so.6 ########################################trace 3 #0 Curl_hash_pick (h=0x3879e030, key=0x3702a5f8, key_len=15) at hash.c:200 200 for (le = l->head; le; le = le->next) { (gdb) bt #0 Curl_hash_pick (h=0x3879e030, key=0x3702a5f8, key_len=15) at hash.c:200 #1 0x0067d482 in Curl_resolv (conn=0x361dba00, hostname=0x38691bd0 "8.19.18.188", port=80, entry=0x4b0ab714) at hostip.c:421 #2 0x0068ee04 in Curl_connect (data=0x979c858, in_connect=0x4b0abe14, asyncp=0x4b0abe12, protocol_done=0x4b0abe13) at url.c:3898 #3 0x0069964d in Curl_perform (data=0x979c858) at transfer.c:2357 #4 0x00699f2b in curl_easy_perform (curl=0x979c858) at easy.c:538 #5 0x080803cb in get_lucid_info (curl_handle=0x979c858, url=0x3814d2e8 "http://ps2-cheats.cheatcodes.com/grand-theft-auto-vice-city-ps2/cheats.html", pub_id=3300, remote_ip_addr=0x4b0bce13 "76.6.153.251", width=728, height=90, lucid_info=0x4b0b50d0) at ../util/lucid_util.c:309 #6 0x080805df in get_lucid_contextual_data (curl_handle=0x979c858, url=0x3814d2e8 "http://ps2-cheats.cheatcodes.com/grand-theft-auto-vice-city-ps2/cheats.html", pub_id=3300, remote_ip_addr=0x4b0bce13 "76.6.153.251", width=728, height=90, lucid_info=0x4b0b50d0) at ../util/lucid_util.c:384 #7 0x08071738 in cache_get_contextual_data (curl_handle=0x979c858, cache=0x4b0bcb80, lucid_info=0x4b0b50d0, url=0x3814d2e8 "http://ps2-cheats.cheatcodes.com/grand-theft-auto-vice-city-ps2/cheats.html", site_id=3301, pub_id=3300, remote_ip_addr=0x4b0bce13 "76.6.153.251", width=728, height=90) at ../cache/cache_contextual_data.c:64 #8 0x0804b8fa in handle_request (thread_data=0x92e5bc4) at ../src/ad_server_main.c:626 #9 0x0029e3cc in start_thread () from /lib/tls/libpthread.so.0 #10 0x002091ae in clone () from /lib/tls/libc.so.6