程序挂死在send()，大家帮猜猜什么原因，server是正常的

jlccwss

程序挂死在send()，大家帮猜猜什么原因，server是正常的
下面是gdb调试PID的信息，fork的进程。

[root@tatu bin]# gdb -p 21142
GNU gdb Fedora (6.8-27.el5)
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Attaching to process 21142
Reading symbols from /home/wangss/workspace/zdnsm_svn/work/bin/zdnsm...done.
Error while mapping shared library sections:
./nmsg_msg7_isc.so: No such file or directory.
Reading symbols from /usr/local/lib/libnmsg.so.6...done.
Loaded symbols for /usr/local/lib/libnmsg.so.6
Reading symbols from /usr/local/lib/libprotobuf.so.6...done.
Loaded symbols for /usr/local/lib/libprotobuf.so.6
Reading symbols from /usr/local/lib/libldns.so.1...done.
Loaded symbols for /usr/local/lib/libldns.so.1
Reading symbols from /usr/lib64/libncurses.so.5...done.
Loaded symbols for /usr/lib64/libncurses.so.5
Reading symbols from /usr/local/lib/libpcap.so.1...done.
Loaded symbols for /usr/local/lib/libpcap.so.1
Reading symbols from /lib64/libdl.so.2...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/librt.so.1...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /usr/local/lib/libz.so.1...done.
Loaded symbols for /usr/local/lib/libz.so.1
Reading symbols from /lib64/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread 0x2b13ede9a3b0 (LWP 21142)]
[New Thread 0x40f69940 (LWP 21149)]
[New Thread 0x45607940 (LWP 2114]
[New Thread 0x44c06940 (LWP 21147)]
[New Thread 0x44205940 (LWP 21146)]
[New Thread 0x43804940 (LWP 21145)]
[New Thread 0x42e03940 (LWP 21144)]
[New Thread 0x42402940 (LWP 21143)]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /opt/oracle/lib/libocci.so.10.1...done.
Loaded symbols for /opt/oracle/lib/libocci.so.10.1
Reading symbols from /opt/oracle/lib/libclntsh.so.10.1...done.
Loaded symbols for /opt/oracle/lib/libclntsh.so.10.1
Reading symbols from /usr/local/lib/libGeoIP.so.1...done.
Loaded symbols for /usr/local/lib/libGeoIP.so.1
Reading symbols from /usr/lib64/libstdc++.so.6...done.
Loaded symbols for /usr/lib64/libstdc++.so.6
Reading symbols from /lib64/libm.so.6...done.
Loaded symbols for /lib64/libm.so.6
Reading symbols from /lib64/libgcc_s.so.1...done.
Loaded symbols for /lib64/libgcc_s.so.1
Reading symbols from /lib64/libc.so.6...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/libnsl.so.1...done.
Loaded symbols for /lib64/libnsl.so.1
Reading symbols from /lib64/libcrypto.so.6...done.
Loaded symbols for /lib64/libcrypto.so.6
Reading symbols from /lib64/ld-linux-x86-64.so.2...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /opt/oracle/lib/libnnz10.so...done.
Loaded symbols for /opt/oracle/lib/libnnz10.so
Reading symbols from /lib64/libnss_files.so.2...done.
Loaded symbols for /lib64/libnss_files.so.2
Symbol file not found for ./nmsg_msg7_isc.so
0x00000030e360d841 in send () from /lib64/libpthread.so.0

到这里按c
程序也不动，就一直卡在这里。我都快疯了
大家帮我想想原因，谢了

jlccwss

我顶

zzyong08

信息太少，没法判断原因。

lanying_wzw

send()阻塞，只能说明发送缓冲区是满的

aobai

send()阻塞，只能说明发送缓冲区是满的
lanying_wzw 发表于 2010-08-28 11:37

   

也要看是socket否为阻塞

cugb_cat

描述符是fork之前生成的还是fork之后生成的？

benjiam

遇到过一次 未解决  同等。

ka-bar

设成非阻塞的socket，然后看send()的返回值，查找下原因。

ideawu

先打log吧, 没必要一上来就gdb.

jiang1013nan

是不是send阻塞啦。。。在调用 read 之前调用select 做一个定时器试试看。

用 select 来检查send handle是否可写，如果不可写的话，超时之后，输出点信息出来看看额。。。