Just realized, I was linking to pthread library and my test program was written
for single threaded application, this was causing the problem.
________________________________________
From: Pramod Srinivasan
Sent: Tuesday, May 21, 2013 4:09 PM
To: [email protected]
Subject: simple zookeeper client in C
Hi ,
I am trying out a simple c client for zookeeper, made a copy of
zookeeper-3.4.5/src/c/src/cli.c just to understand how the c APIs works, the
program is attached.
I see errors/coredumps being generated, I am surely doing something wrong, any
help appreciated.
case 1:
.../zookeeper-3.4.5/src/c> ./myt localhost:2181
Watcher SESSION_EVENT state = CONNECTED_STATE
Connected ...
Watcher SESSION_EVENT state = CONNECTED_STATE
Connected ...
Segmentation fault (core dumped)
starting it under gdb:
(gdb) r localhost:2181
Starting program: .../zookeeper-3.4.5/src/c/myt localhost:2181
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff70d9700 (LWP 9489)]
[New Thread 0x7ffff68d8700 (LWP 9490)]
Watcher SESSION_EVENT state = CONNECTED_STATE
Connected ...
Watcher SESSION_EVENT state = CONNECTED_STATE
Connected ...
2013-05-21
15:58:03,210:9485(0x7ffff7fd7700):ZOO_ERROR@handle_socket_error_msg@1643:
Socket [127.0.0.1:2181] zk retcode=-7, errno=110(Connection timed out):
connection to 127.0.0.1:2181 timed out (exceeded timeout by 1ms)
2013-05-21
15:58:03,210:9485(0x7ffff70d9700):ZOO_ERROR@handle_socket_error_msg@1643:
Socket [127.0.0.1:2181] zk retcode=-7, errno=110(Connection timed out):
connection to 127.0.0.1:2181 timed out (exceeded timeout by 2ms)
Watcher SESSION_EVENT state = CONNECTING_STATE
Watcher SESSION_EVENT state = CONNECTING_STATE
2013-05-21 15:58:13,212:9485(0x7ffff7fd7700):ZOO_WARN@zookeeper_interest@1557:
Exceeded deadline by 10003ms
Watcher SESSION_EVENT state = CONNECTED_STATE
Connected ...
Program received signal SIGSEGV, Segmentation fault.
queue_buffer (list=0x6030b8, b=0x0, add_to_front=0) at src/zookeeper.c:970
970 b->next = 0;
(gdb) bt
#0 queue_buffer (list=0x6030b8, b=0x0, add_to_front=0) at src/zookeeper.c:970
#1 0x00007ffff7bc939d in check_events (events=<optimized out>, zh=0x603040) at
src/zookeeper.c:1727
#2 zookeeper_process (zh=0x603040, events=<optimized out>) at
src/zookeeper.c:2170
#3 0x0000000000401448 in main (argc=2, argv=0x7fffffffeab8) at mytest.c:542
case 2:
2013-05-21
15:49:25,811:2493(0x7fae0ec17700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
15:49:25,812:2493(0x7fae0fb16700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
15:49:25,813:2493(0x7fae0ec17700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
15:49:25,814:2493(0x7fae0fb16700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
15:49:25,814:2493(0x7fae0ec17700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
15:49:25,815:2493(0x7fae0fb16700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
15:49:25,816:2493(0x7fae0ec17700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
Segmentation fault (core dumped)
under gdb:
2013-05-21
16:05:13,598:10413(0x7ffff7fd7700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
16:05:13,598:10413(0x7ffff70d9700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
16:05:13,599:10413(0x7ffff7fd7700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
2013-05-21
16:05:13,599:10413(0x7ffff70d9700):ZOO_ERROR@handle_socket_error_msg@1579:
Socket [:0] zk retcode=-1, errno=97(Address family not supported by protocol):
socket() call failed
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff70d9700 (LWP 10415)]
zookeeper_interest (zh=0x603040, fd=0x7ffff70d8e38, interest=0x7ffff70d8e3c,
tv=0x7ffff70d8e20)
at src/zookeeper.c:1577
1577 zh->fd = socket(zh->addrs[zh->connect_index].ss_family,
SOCK_STREAM, 0);
(gdb) bt
#0 zookeeper_interest (zh=0x603040, fd=0x7ffff70d8e38,
interest=0x7ffff70d8e3c, tv=0x7ffff70d8e20)
at src/zookeeper.c:1577
#1 0x00007ffff7bd1361 in do_io (v=0x603040) at src/mt_adaptor.c:378
#2 0x00007ffff72eee9a in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#3 0x00007ffff78f3cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#4 0x0000000000000000 in ?? ()
case 3
zookeeper-3.4.5/src/c> ./myt localhost:2181
Watcher SESSION_EVENT state = CONNECTED_STATE
Connected ...
2013-05-21
15:54:04,078:7030(0x7f36727cf700):ZOO_ERROR@handle_socket_error_msg@1643:
Socket [127.0.0.1:2181] zk retcode=-7, errno=110(Connection timed out):
connection to 127.0.0.1:2181 timed out (exceeded timeout by 7ms)
Watcher SESSION_EVENT state = CONNECTING_STATE
Watcher SESSION_EVENT state = CONNECTED_STATE
Connected ...
2013-05-21
15:54:24,085:7030(0x7f36736ce700):ZOO_ERROR@handle_socket_error_msg@2245:
Socket [127.0.0.1:2181] zk retcode=-2, errno=115(Operation now in progress):
unexpected server response: expected 0x14584484, but received 0xfffffffe
Watcher SESSION_EVENT state = CONNECTING_STATE
2013-05-21
15:54:34,088:7030(0x7f36727cf700):ZOO_ERROR@handle_socket_error_msg@1721:
Socket [127.0.0.1:2181] zk retcode=-4, errno=112(Host is down): failed while
receiving a server response
2013-05-21
15:54:34,091:7030(0x7f36736ce700):ZOO_ERROR@handle_socket_error_msg@1721:
Socket [127.0.0.1:2181] zk retcode=-4, errno=112(Host is down): failed while
receiving a server response
2013-05-21
15:54:44,099:7030(0x7f36727cf700):ZOO_ERROR@handle_socket_error_msg@1721:
Socket [127.0.0.1:2181] zk retcode=-4, errno=112(Host is down): failed while
receiving a server response
2013-05-21
15:54:44,099:7030(0x7f36736ce700):ZOO_ERROR@handle_socket_error_msg@1721:
Socket [127.0.0.1:2181] zk retcode=-4, errno=112(Host is down): failed while
receiving a server response
The java client worked perfectly fine and the zkCli.sh works fine as well.
