apache日志问题?

[Mon Nov 24 09:10:56 2008] [error] [client 221.1.205.46] Invalid URI in request  zxuddz, uqlji, uxnjbv, mouyzux, xuddzl, qljit, tqkxuoab, zxuddzlb, ljitmi, kxudj, rdjliqz, ddzlbu, jitkx, rtzxlkug, glyzxlku, tauaslqk, zxlkug, edogzx, ugotdedo, xuddzlbu, jitau, jbvfum, yzuxn, uddzlb, ljitmitq, uoaboz, uddzlbuq, itmitq, udjfordj, qzxudd, buqlj, kxfjrtzx, ugotgl, xxlkug, auaslqk, zxxlkug, edogzx, ugotde, gzxxu, zlbuqlj, auxnjbv, mouyzux, xuddzlb, ljitmitq, uoabozzx, dzlbuq, itmitqkx, jfordjl, zxuddzlb, ljitk, jrtzxlku, tglyzxl, gotau, lqkud, lkugo, dogzxlkug, referer: http://www.abc.com/content/200811/188945.shtml

[Mon Nov 24 09:10:59 2008] [error] [client 221.1.205.46] Invalid URI in request  zxuddz, uqlji, uxnjbv, mouyzux, xuddzl, qljit, tqkxuoab, zxuddzlb, ljitmi, kxudj, rdjliqz, ddzlbu, jitkx, rtzxlkug, glyzxlku, tauaslqk, zxlkug, edogzx, ugotdedo, xuddzlbu, jitau, jbvfum, yzuxn, uddzlb, ljitmitq, uoaboz, uddzlbuq, itmitq, udjfordj, qzxudd, buqlj, kxfjrtzx, ugotgl, xxlkug, auaslqk, zxxlkug, edogzx, ugotde, gzxxu, zlbuqlj, auxnjbv, mouyzux, xuddzlb, ljitmitq, uoabozzx, dzlbuq, itmitqkx, jfordjl, zxuddzlb, ljitk, jrtzxlku, tglyzxl, gotau, lqkud, lkugo, dogzxlkug, referer: http://www.abc.com/content/200811/188945.shtml

在apache的日志文件error.log里发现许多这样的日志,是什么原因引起的?

另外也有此类的日志信息：

[Sun Nov 23 16:40:14 2008] [error] [client 59.42.41.10] Invalid URI in request , ja-jp;q=0.68, zh-sg;q=0.65, en-zw;q=0.5, e s-es, fo, fr-fr;q=0.4, fr-ca;q=0.34, hu, it-it;q=0.21, ms;q=0.2, nl, no, pl;q=0.11, pt-br;q=0.1, ru -ru, sv;q=0.9, zh-mo;q=0.8, zh-cn, zh-tw, en-us;q=0.9, en-gb;q=0.8, en-ca;q=0.6, ja;q=0.5, zh-hk;q= 0.3, en-nz;q=0.2, en-sg;q=0.1, ja, ko, cs;q=0.91, da;q=0.82, de, en-au;q=0.8, en-my;q=0.77, ja-jp;q =0.68, zh-sg;q=0.65, en-zw;q=0.5, es-es, fo, fr-fr;q=0.4, fr-ca;q=0.34, hu, it-it;q=0.21, ms;q=0.2, nl, no, pl;q=0.11, pt-br;q=0.1, ru-ru, sv;q=0.9, zh-mo;q=0.8, zh-cn, zh-tw, en-us;q=0.9, en-gb;q=0. 8, en-ca;q=0.6, ja;q=0.5, zh-hk;q=0.3, en-nz;q=0.2, en-sg;q=0.1, ja, ko, cs;q=0.91, da;q=0.82, de,  en-au;q=0.8, en-my;q=0.77, ja-jp;q=0.68, zh-sg;q=0.65, en-zw;q=0.5, es-es, fo, fr-fr;q=0.4,fr-ca;q= 0.34, hu, it-it;q=0.21, ms;q=0.2, nl, no, pl;q=0.11, pt-br;q=0.1, ru-ru, sv;q=0.9, zh-mo;q=0.8, zh- cn, zh-tw, en-us;q=0.9 en-gb;q=0.8, en-ca;q=0.6, ja;q=0.5, zh-hk;q=0.3, en-nz;q=0.2, en-sg;q=0.1, j a, ko, cs;q=0.91, da;q=0.82, de, en-au;q=0.8, en-my;q=0.77, ja-jp;q=0.68, zh-sg;q=0.6

[Sun Nov 23 16:40:22 2008] [error] [client 59.42.41.10] Invalid URI in request , en-nz;q=0.2, en-sg;q=0.1, ja, ko, cs;q=0.91, da;q=0.82, de, en-au;q=0.8, en-my;q=0.77, ja-jp;q =0.68, zh-sg;q=0.65, en-zw;q=0.5, es-es, fo, fr-fr;q=0.4, fr-ca;q=0.34, hu, it-it;q=0.21, ms;q=0.2, nl, no, pl;q=0.11, pt-br;q=0.1, ru-ru, sv;q=0.9, zh-mo;q=0.8, zh-cn, zh-tw, en-us;q=0.9, en-gb;q=0. 8, en-ca;q=0.6, ja;q=0.5, zh-hk;q=0.3, en-nz;q=0.2, en-sg;q=0.1, ja, ko, cs;q=0.91, da;q=0.82, de,  en-au;q=0.8, en-my;q=0.77, ja-jp;q=0.68, zh-sg;q=0.65, en-zw;q=0.5, es-es, fo, fr-fr;q=0.4,fr-ca;q= 0.34, hu, it-it;q=0.21, ms;q=0.2, nl, no, pl;q=0.11, pt-br;q=0.1, ru-ru, sv;q=0.9, zh-mo;q=0.8, zh- cn, zh-tw, en-us;q=0.9 en-gb;q=0.8, en-ca;q=0.6, ja;q=0.5, zh-hk;q=0.3, en-nz;q=0.2, en-sg;q=0.1, j a, ko, cs;q=0.91, da;q=0.82, de, en-au;q=0.8, en-my;q=0.77, ja-jp;q=0.68, zh-sg;q=0.6, referer: http://www.abc.com/content/200804/28688.shtml

[Sun Nov 23 16:40:25 2008] [error] [client 59.42.41.10] Invalid URI in request .11, pt-br;q=0.1, ru -ru, sv;q=0.9, zh-mo;q=0.8, zh-cn, zh-tw, en-us;q=0.9, en-gb;q=0.8, en-ca;q=0.6, ja;q=0.5, zh-hk;q= 0.3, en-nz;q=0.2, en-sg;q=0.1, ja, ko, cs;q=0.91, da;q=0.82, de, en-au;q=0.8, en-my;q=0.77, ja-jp;q =0.68, zh-sg;q=0.65, en-zw;q=0.5, es-es, fo, fr-fr;q=0.4, fr-ca;q=0.34, hu, it-it;q=0.21, ms;q=0.2, nl, no, pl;q=0.11, pt-br;q=0.1, ru-ru, sv;q=0.9, zh-mo;q=0.8, zh-cn, zh-tw, en-us;q=0.9, en-gb;q=0. 8, en-ca;q=0.6, ja;q=0.5, zh-hk;q=0.3, en-nz;q=0.2, en-sg;q=0.1, ja, ko, cs;q=0.91, da;q=0.82, de,  en-au;q=0.8, en-my;q=0.77, ja-jp;q=0.68, zh-sg;q=0.65, en-zw;q=0.5, es-es, fo, fr-fr;q=0.4,fr-ca;q= 0.34, hu, it-it;q=0.21, ms;q=0.2, nl, no, pl;q=0.11, pt-br;q=0.1, ru-ru, sv;q=0.9, zh-mo;q=0.8, zh- cn, zh-tw, en-us;q=0.9 en-gb;q=0.8, en-ca;q=0.6, ja;q=0.5, zh-hk;q=0.3, en-nz;q=0.2, en-sg;q=0.1, j a, ko, cs;q=0.91, da;q=0.82, de, en-au;q=0.8, en-my;q=0.77, ja-jp;q=0.68, zh-sg;q=0.6