Hello All,
I have snmpd running as a master. I have another process that runs a single
thread for SNMP work. This thread has the same code as the example code for
"Writing a Subagent" tutorial.
However, I run into a deadlock issue. The master sends AgentX pdu to
subagent. The subagent hangs. The master times out and deregisters the
subagent.
I'll appreciate any help or pointers. I have attached detailed logs. I have
also tried using other modules and have the same problem.
Thanks in advance.
MASTER LOGS:
2007-10-23 23:33:26 trace: netsnmp_call_handler(): agent_handler.c, 438:
2007-10-23 23:33:26 handler:returned: handler AgentX subagent 5, session
0x622040, subsession 0x633470 re2007-10-23 23:33:26 trace:
netsnmp_handle_request(): snmp_agent.c, 3126:
2007-10-23 23:33:26 results: request results (status = 0):
2007-10-23 23:33:26 trace: netsnmp_handle_request(): snmp_agent.c, 3129:
2007-10-23 23:33:26 results: RFC1155-SMI::enterprises.8072.2.4.1.1.2.0 =
No Such Instance currently ex2007-10-23 23:33:26 trace:
netsnmp_check_for_delegated_and_add(): snmp_agent.c, 1373:
2007-10-23 23:33:26 snmp_agent: delegate session == 0x6001b0
2007-10-23 23:33:26 trace: handle_snmp_packet(): snmp_agent.c, 1858:
2007-10-23 23:33:26 snmp_agent: end of handle_snmp_packet, asp = 0x6001b0
2007-10-23 23:33:26 trace: _sess_read(): snmp_api.c, 5445:
2007-10-23 23:33:26 sess_read: not reading 6 (fdset 0x7fff57e86510 set 0)
2007-10-23 23:33:26 trace: _sess_read(): snmp_api.c, 5445:
2007-10-23 23:33:26 sess_read: not reading 4 (fdset 0x7fff57e86510 set 0)
2007-10-23 23:33:26 trace: snmp_sess_select_info(): snmp_api.c, 5868:
2007-10-23 23:33:26 sess_select: for all sessions: 8 (to in
1193182406.754001 sec) 7 6 4
2007-10-23 23:33:26 sess_select: next alarm 1.72386 sec
2007-10-23 23:33:26 verbose:sess_select: timer due *real* soon. 2908 usec
2007-10-23 23:33:26 verbose:sess_select: setting timer to 0.2908 sec, clear
block (was 0)
2007-10-23 23:33:26 trace: receive(): snmpd.c, 1144:
2007-10-23 23:33:26 snmpd/select: select( numfds=9, ..., tvp=0x7fff57e86610)
2007-10-23 23:33:26 trace: receive(): snmpd.c, 1146:
2007-10-23 23:33:26 timer: tvp 0.2908
2007-10-23 23:33:26 trace: receive(): snmpd.c, 1148:
2007-10-23 23:33:26 snmpd/select: returned, count = 0
2007-10-23 23:33:26 trace: snmp_sess_select_info(): snmp_api.c, 5868:
2007-10-23 23:33:26 sess_select: for all sessions: 8 (to in
1193182406.754001 sec) 7 6 4
2007-10-23 23:33:26 sess_select: next alarm 1.69847 sec
2007-10-23 23:33:26 verbose:sess_select: timer due *real* soon. 370 usec
2007-10-23 23:33:26 verbose:sess_select: setting timer to 0.370 sec, clear
block (was 0)
2007-10-23 23:33:26 trace: receive(): snmpd.c, 1144:
2007-10-23 23:33:26 snmpd/select: select( numfds=9, ..., tvp=0x7fff57e86610)
2007-10-23 23:33:26 trace: receive(): snmpd.c, 1146:
2007-10-23 23:33:26 timer: tvp 0.370
2007-10-23 23:33:26 trace: receive(): snmpd.c, 1148:
2007-10-23 23:33:26 snmpd/select: returned, count = 0
2007-10-23 23:33:26 trace: agentx_got_response(): mibgroup/agentx/master.c,
238:
2007-10-23 23:33:26 agentx/master: timeout on session 0x622040
2007-10-23 23:33:26 trace: close_agentx_session():
mibgroup/agentx/master_admin.c, 134:
2007-10-23 23:33:26 agentx/master: close 0x622040, -1
2007-10-23 23:33:26 trace: netsnmp_remove_delegated_requests_for_session():
snmp_agent.c, 1447:
2007-10-23 23:33:26 snmp_agent: removed 2 delegated request(s) for session
0x633470
SUBAGENT LOGS:
2007-10-23 23:33:16 dumph_recv: AgentX Header
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1464:
2007-10-23 23:33:16 dumph_recv: Version
2007-10-23 23:33:16 dumpx_recv: 01
2007-10-23 23:33:16 dumpv_recv: Version: 1
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1471:
2007-10-23 23:33:16 dumph_recv: Command
2007-10-23 23:33:16 dumpx_recv: 05
2007-10-23 23:33:16 dumpv_recv: Command: 5 (Get)
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1479:
2007-10-23 23:33:16 dumph_recv: Flags
2007-10-23 23:33:16 dumpx_recv: 00
2007-10-23 23:33:16 dumpv_recv: Flags: 0x0
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1486:
2007-10-23 23:33:16 dumph_recv: Reserved Byte
2007-10-23 23:33:16 dumpx_recv: 00
2007-10-23 23:33:16 dumpv_recv: Reserved: 0x0
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1492:
2007-10-23 23:33:16 dumph_recv: Session ID
2007-10-23 23:33:16 dumpx_recv: 05 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 5 (0x05)
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1500:
2007-10-23 23:33:16 dumph_recv: Transaction ID
2007-10-23 23:33:16 dumpx_recv: 03 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 3 (0x03)
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1508:
2007-10-23 23:33:16 dumph_recv: Packet ID
2007-10-23 23:33:16 dumpx_recv: 04 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 4 (0x04)
2007-10-23 23:33:16 trace: agentx_parse_header():
mibgroup/agentx/protocol.c, 1515:
2007-10-23 23:33:16 dumph_recv: Payload Length
2007-10-23 23:33:16 dumpx_recv: 28 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 40 (0x28)
2007-10-23 23:33:16 trace: agentx_parse(): mibgroup/agentx/protocol.c, 1607:
2007-10-23 23:33:16 dumph_recv: PDU
2007-10-23 23:33:16 trace: agentx_parse(): mibgroup/agentx/protocol.c, 1736:
2007-10-23 23:33:16 dumph_recv: Search Range
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1118:
2007-10-23 23:33:16 dumph_recv: OID Header
2007-10-23 23:33:16 dumpx_recv: 08 04 00 00
2007-10-23 23:33:16 dumpv_recv: # subids: 8 (0x08)
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1122:
2007-10-23 23:33:16 dumpv_recv: prefix: 4 (0x04)
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1125:
2007-10-23 23:33:16 dumpv_recv: inclusive: 0 (0x00)
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1130:
2007-10-23 23:33:16 dumph_recv: OID Segments
2007-10-23 23:33:16 parse_oid
2007-10-23 23:33:16 sizeof(oid) = 8
2007-10-23 23:33:16 dumpx_recv: 01 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 1 (0x01)
2007-10-23 23:33:16 dumpx_recv: 88 1F 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 8072 (0x1F88)
2007-10-23 23:33:16 dumpx_recv: 02 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 2 (0x02)
2007-10-23 23:33:16 dumpx_recv: 04 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 4 (0x04)
2007-10-23 23:33:16 dumpx_recv: 01 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 1 (0x01)
2007-10-23 23:33:16 dumpx_recv: 01 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 1 (0x01)
2007-10-23 23:33:16 dumpx_recv: 02 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 2 (0x02)
2007-10-23 23:33:16 dumpx_recv: 00 00 00 00
2007-10-23 23:33:16 dumpv_recv: Integer: 0 (0x00)
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1205:
2007-10-23 23:33:16 dumpv_recv: OID: RFC1155-SMI::
enterprises.8072.2.4.1.1.2.0
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1118:
2007-10-23 23:33:16 dumph_recv: OID Header
2007-10-23 23:33:16 dumpx_recv: 00 00 00 00
2007-10-23 23:33:16 dumpv_recv: # subids: 0 (0x00)
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1122:
2007-10-23 23:33:16 dumpv_recv: prefix: 0 (0x00)
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1125:
2007-10-23 23:33:16 dumpv_recv: inclusive: 0 (0x00)
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1130:
2007-10-23 23:33:16 dumph_recv: OID Segments
2007-10-23 23:33:16 parse_oid
2007-10-23 23:33:16 sizeof(oid) = 8
2007-10-23 23:33:16 trace: agentx_parse_oid(): mibgroup/agentx/protocol.c,
1152:
2007-10-23 23:33:16 dumpv_recv: OID: NULL (0.0)
2007-10-23 23:33:16 trace: handle_agentx_packet():
mibgroup/agentx/subagent.c, 308:
2007-10-23 23:33:16 agentx/subagent: handling agentx request
(req=0x4,trans=0x3,sess=0x5)
2007-10-23 23:33:16 trace: handle_agentx_packet():
mibgroup/agentx/subagent.c, 329:
2007-10-23 23:33:16 agentx/subagent: -> get
------------> gets stuck here - waits for a lock in snmp_sess_session
-------------------------------------------------------------------------
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