A backend daemon using openldap was frequently halted,  The problem was finally located at an openldap function ldap_simple_bind_s. Below is a trace back of the running system:
<div><br></div><div><div>#0 &nbsp;0x00a0c7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2</div><div>#1 &nbsp;0x004e0b24 in poll () from /lib/tls/libc.so.6</div><div>#2 &nbsp;0x00ab8128 in ldap_int_select (ld=0x1, timeout=0x0) at os-ip.c:983</div>
<div>#3 &nbsp;0x00aa7f5f in wait4msg (ld=0x8f0a2c0, msgid=21, all=1, timeout=0x0, result=0x36fc1c4) at result.c:355</div><div>#4 &nbsp;0x00aa7b32 in ldap_result (ld=0x8f0a2c0, msgid=21, all=1, timeout=0x0, result=0x36fc1c4) at result.c:127</div>
<div>#5 &nbsp;0x00aad5d2 in ldap_sasl_bind_s (ld=0x8f0a2c0, dn=0x36fc260 &quot;uid=chenming,domain=<a href="http://vip.eyou.net">vip.eyou.net</a>,o=<a href="http://vip.eyou.net">vip.eyou.net</a>&quot;,</div><div>&nbsp;&nbsp; &nbsp;mechanism=0x0, cred=0x36fc208, sctrls=0x0, cctrls=0x0, servercredp=0x0) at sasl.c:194</div>
<div>#6 &nbsp;0x00aadc74 in ldap_simple_bind_s (ld=0x8f0a2c0, dn=0x36fc260 &quot;uid=chenming,domain=<a href="http://vip.eyou.net">vip.eyou.net</a>,o=<a href="http://vip.eyou.net">vip.eyou.net</a>&quot;,</div><div>&nbsp;&nbsp; <font class="Apple-style-span" color="#FF0000">&nbsp;passwd=0x36fca4a &quot;&quot;</font>) at sbind.c:113</div>
<div>#7 &nbsp;0x003ab2b0 in eyou_db_alias_auth (pdbh=0x36fd3a8, uid=0x8efd8a0 &quot;chenming&quot;, domain=0x8efd8c1 &quot;<a href="http://vip.eyou.net">vip.eyou.net</a>&quot;,</div><div>&nbsp;&nbsp; &nbsp;<font class="Apple-style-span" color="#FF0000">password=0x36fca40 &quot;xxxxxxxxx&quot;,</font> alias=0x36fc5c0 &quot;&quot;) at ldap/eyou_db.c:153</div>
<div>#8 &nbsp;0x003ab1ae in eyou_db_real_auth (dh=0x36fd3a8, uid=0x8efd8a0 &quot;chenming&quot;, domain=0x8efd8c1 &quot;<a href="http://vip.eyou.net">vip.eyou.net</a>&quot;,</div><div>&nbsp;&nbsp; &nbsp;password=0x36fca40 &quot;xxxxxxxxx&quot;, realuid=0x36fc5c0 &quot;&quot;, realdomain=0x36fc570 &quot;&quot;) at ldap/eyou_db.c:123</div>
<div>#9 &nbsp;0x003c7669 in get_user_info_by_ldap (uid=0x8efd8a0 &quot;chenming&quot;, domain=0x8efd8c1 &quot;<a href="http://vip.eyou.net">vip.eyou.net</a>&quot;, userinfo=0x8efbd18,</div><div>&nbsp;&nbsp; &nbsp;edbh=0x36fd3a8, password=0x36fca40 &quot;xxxxxxxxx&quot;) at utils/user_info.c:559</div>
<div>#10 0x003c5cd9 in get_user_info (edbh=0x36fd3a8, uid=0x8efd8a0 &quot;chenming&quot;, domain=0x8efd8c1 &quot;<a href="http://vip.eyou.net">vip.eyou.net</a>&quot;,</div><div>&nbsp;&nbsp; &nbsp;password=0x36fca40 &quot;xxxxxxxxx&quot;, userinfo=0x8efbd18) at utils/user_info.c:160</div>
<div>#11 0x003a18da in user_validate (edbh=0x36fd3a8, uid=0x8efd8a0 &quot;chenming&quot;, domain=0x8efd8c1 &quot;<a href="http://vip.eyou.net">vip.eyou.net</a>&quot;,</div><div>&nbsp;&nbsp; &nbsp;pass=0x36fca40 &quot;chenkane1&quot;, userinfo=0x8efbd18) at utils/user_validate.c:61</div>
<div>#12 0x0804b6f2 in pop3_pass (arg=0x36fce80 &quot;xxxxxxxxx&quot;, fun_arg=0x8efd8a0) at pop3_protocol.c:363</div><div>#13 0x0804d41a in new_commands (eio_fp=0x8f15cb8, tls_start=0, ssl=0x0, c=0x36fd2e0, fun_arg=0x8efd8a0) at commands.c:63</div>
<div>#14 0x0804ad94 in eyou_pop3 (eyou_db_hander=0x36fd3a8, eyou_socket_hander=0x8eff7e8) at pop3d.c:138</div><div>#15 0x08050470 in net_deliver (arg=0x8eef300) at gaea/deliver.c:219</div><div>#16 0x00b873cc in start_thread () from /lib/tls/libpthread.so.0</div>
<div>#17 0x004ea96e in clone () from /lib/tls/libc.so.6</div><div><br></div><div><span class="Apple-style-span" style="font-family: monospace; font-size: 16px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">The problem may be in the lines with red marked,&nbsp;However,&nbsp;this&nbsp;should not cause the program be&nbsp;<span class="Apple-style-span" style="font-family: arial; font-size: small; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; ">haltedĦ£</span></span></div>
<div><br></div><div><span class="Apple-style-span" style="font-family: monospace; font-size: 16px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">Can i resolve the problem by</span>&nbsp;set a timeout with openldap £żAnd how to do ?</div>
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