我正在尝试使用 lib php-imap v2.0.3 和 php 5.3 从 cron 启动的 symfony v2.8 命令读取来自 ftp的邮件。对于完全相同的邮件，有时该过程会挂起 Mailbox::getMail，有时它可以正常工作。不知道什么时候。我迄今为止最好的线索是这个 gdb 回溯。任何想法 ？谢谢
(gdb) bt
#0 0x00007fa89485b970 in read () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fa896dd834a in ?? () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#2 0x00007fa896dd60f9 in BIO_read () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#3 0x00007fa896a9ec26 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#4 0x00007fa896aa00a3 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#5 0x00007fa896a9cf22 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#6 0x00007fa8875e7b79 in ssl_getdata () from /usr/lib/libc-client.so.2007e
#7 0x00007fa8875e7d66 in ssl_getbuffer () from /usr/lib/libc-client.so.2007e
#8 0x00007fa8876134f6 in imap_parse_string () from /usr/lib/libc-client.so.2007e
#9 0x00007fa887618acd in imap_parse_unsolicited () from /usr/lib/libc-client.so.2007e
#10 0x00007fa887618f6f in imap_reply () from /usr/lib/libc-client.so.2007e
#11 0x00007fa88761901b in imap_sout () from /usr/lib/libc-client.so.2007e
#12 0x00007fa88761a722 in imap_send () from /usr/lib/libc-client.so.2007e
#13 0x00007fa88761f69a in imap_msgdata () from /usr/lib/libc-client.so.2007e
#14 0x00007fa8875f391c in mail_fetch_body () from /usr/lib/libc-client.so.2007e
#15 0x00007fa8878ddcf5 in zif_imap_fetchbody () from /usr/lib/php5/20131226/imap.so
#16 0x00000000006f50d9 in dtrace_execute_internal ()