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一、现象：SQL/DEVELOPER，连接数据库时报了ORA-12505：TNS:listener does not currently kown of SID given in connect descriptor
二、查看信息：
1、lsnrctl status查看监听正常
2、crs_stat -t 发现：ora.....d1.inst 目标状态和当前状态是OFFLINE，通过ps -ef | grep pmon 发现实例1确实down了
$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora.exprd.db application ONLINE ONLINE trsendb2
ora.....exp.cs application ONLINE ONLINE trsendb1
ora....rd1.srv application ONLINE ONLINE trsendb1
ora....d1.inst application OFFLINE OFFLINE trsendb1
ora.....flt.cs application ONLINE ONLINE trsendb1
ora....rd1.srv application ONLINE ONLINE trsendb1
ora....rd2.srv application ONLINE ONLINE trsendb1
ora.....mdm.cs application ONLINE ONLINE trsendb2
ora....rd1.srv application ONLINE ONLINE trsendb1
ora....rd2.srv application ONLINE ONLINE trsendb2
ora....rd1.srv application ONLINE ONLINE trsendb1
ora.....ord.cs application ONLINE ONLINE trsendb2
ora....rd2.srv application ONLINE ONLINE trsendb1
ora.....pbl.cs application ONLINE ONLINE trsendb1
ora....rd1.srv application ONLINE ONLINE trsendb1
ora.....rpt.cs application ONLINE ONLINE trsendb2
ora....rd2.srv application ONLINE ONLINE trsendb1
ora.....rut.cs application ONLINE ONLINE trsendb1
ora.....stl.cs application ONLINE ONLINE trsendb2
ora....rd2.srv application ONLINE ONLINE trsendb1
ora....SM1.asm application ONLINE ONLINE trsendb1
ora....R1.lsnr application ONLINE ONLINE trsendb1
ora....vr1.gsd application ONLINE ONLINE trsendb1
ora....vr1.ons application ONLINE ONLINE trsendb1
ora....vr1.vip application ONLINE ONLINE trsendb1
ora....SM2.asm application ONLINE ONLINE trsendb2
ora....R2.lsnr application ONLINE ONLINE trsendb2
ora....vr2.gsd application ONLINE ONLINE trsendb2
ora....vr2.ons application ONLINE ONLINE trsendb2
ora....vr2.vip application ONLINE ONLINE trsendb2
$ ps -ef | grep pmon
oracle 3222 1 0 Mar 12 ? 9:09 asm_pmon_+ASM1
oracle 2147 1415 0 17:14:53 pts/1 0:00 grep pmon
3、日志
OS日志
Apr 9 14:37:16 trsen01 sshd[1068]: SSH: Server;LType: Throughput;Remote: 192.168.8.199-56261;IN: 5112;OUT: 1812;Duration: 16.9;tPut_in: 302.7;tPut_out: 107.3
Apr 10 14:45:19 trsen01 vmunix: class : tgtpath, instance 8
Apr 10 14:45:19 trsen01 vmunix: Target path (class=tgtpath, instance=8) has gone offline. The target path h/w path is 0/0/0/5/0/0/1.0x50001fe1501c8e0a
Apr 10 14:45:19 trsen01 vmunix:
Apr 10 14:45:26 trsen01 vmunix: class : tgtpath, instance 6
Apr 10 14:45:26 trsen01 vmunix: cTlaarsgse t: ptagtthp a(tchl,a sisn=sttgatnpcaet h7,
Apr 10 14:45:26 trsen01 vmunix: iTnasrtgaentc e=6) has gone offline. The target path h/w path is 0/0/0/5/0/0/1.0x50001fe1501c8e0e
Apr 10 14:45:26 trsen01 vmunix: path (class=tgtpath, instance=7) has gone offline. The target path h/w path is 0/0/0/5/0/0/1.0x50001fe1501c8e0f
Apr 10 14:45:26 trsen01 vmunix:
Apr 10 14:45:27 trsen01 vmunix: class : tgtpath, instance 2
Apr 10 14:45:27 trsen01 vmunix: Target path (class=tgtpath, instance=2) has gone offline. The target path h/w path is 0/0/0/5/0/0/0.0x50001fe1501c8e0c
Apr 10 14:45:27 trsen01 vmunix: class : tgtpath, instance 3
Apr 10 14:45:27 trsen01 vmunix: Target path (class=tgtpath, instance=3) has gone offline. The target path h/w path is 0/0/0/5/0/0/0.0x50001fe1501c8e0d
Apr 10 14:45:27 trsen01 vmunix: class : tgtpath, instance 4
Apr 10 14:45:27 trsen01 vmunix: Target path (class=tgtpath, instance=4) has gone offline. The target path h/w path is 0/0/0/5/0/0/0.0x50001fe1501c8e08
Apr 10 14:45:27 trsen01 vmunix: class : tgtpath, instance 5
Apr 10 14:45:27 trsen01 vmunix: Target path (class=tgtpath, instance=5) has gone offline. The target path h/w path is 0/0/0/5/0/0/0.0x50001fe1501c8e09
Apr 10 14:45:28 trsen01 vmunix: class : tgtpath, instance 9
Apr 10 14:45:28 trsen01 vmunix: Target path (class=tgtpath, instance=9) has gone offline. The target path h/w path is 0/0/0/5/0/0/1.0x50001fe1501c8e0b
ALER日志
Thu Apr 10 14:43:46 EAT 2014
Errors in file /u01/app/oracle/product/admin/trsendb/bdump/trsendb1_lgwr_3473.trc:
ORA-00340: IO error processing online log 5 of thread 1
ORA-00345: redo log write error block 436153 count 1
ORA-00312: online log 5 thread 1: '+TDBASM2/trsendb/onlinelog/group_5.5776.752860931'
ORA-65535: Message 65535 not found; product=RDBMS; facility=ORA
ORA-00345: redo log write error block 436153 count 1
ORA-00312: online log 5 thread 1: '+TDBASM2/trsendb/onlinelog/group_5.5777.752860951'
ORA-65535: Message 65535 not found; product=RDBMS; facility=ORA
LGWR: terminating instance due to error 340
Thu Apr 10 14:43:46 EAT 2014
Trace dumping is performing id=[cdmp_20140410144346]
Thu Apr 10 14:43:55 EAT 2014
Termination issued to instance processes. Waiting for the processes to exit
Thu Apr 10 14:44:01 EAT 2014
Instance termination failed to kill one or more processes
Instance terminated by LGWR, pid = 3473==================>中断实例
Thu Apr 10 15:15:49 EAT 2014
lgwr trc日志
*** 2014-04-10 14:43:43.930=============>在14:43:43时，报错了LGWR IO失败
Warning: log write time 820ms, size 2KB
WARNING: IO Failed. au:107090 diskname:/dev/rdisk/asm5disk
rq:9ffffffffd0018e8 buffer:c000000100640800 au_offset(bytes):189440 iosz:1024 operation:1
status:2
WARNING: IO Failed. au:106889 diskname:/dev/rdisk/asm10disk
ocssd日志
[ CSSD]2014-04-10 14:45:26.070 [8] >WARNING: clssnmDiskPMT: voting device offline at 50% fatal, termination in 99613 ms, disk (0//dev/rdisk/votingdisk)==>磁盘心跳出现问题
[ CSSD]2014-04-10 14:46:16.022 [8] >WARNING: clssnmDiskPMT: voting device offline at 75% fatal, termination in 49661 ms, disk (0//dev/rdisk/votingdisk)
[ CSSD]2014-04-10 14:46:46.590 [8] >WARNING: clssnmDiskPMT: voting device offline at 90% fatal, termination in 19093 ms, disk (0//dev/rdisk/votingdisk)
[ CSSD]2014-04-10 14:46:47.600 [8] >WARNING: clssnmDiskPMT: voting device offline at 90% fatal, termination in 18083 ms, disk (0//dev/rdisk/votingdisk)
从整个日志可以看出：
=>LGWR进程43:43.930s在无法写日志，导致出现IO错误
=>44:01s Instance terminated by LGWR
=>45:19~:45:26 os日志记录class : tgtpath, instance x has gone offline
=>45:26.070s 磁盘心跳出现问题
=>在15点左右，开发出现连不上数据问题
从日志初步分析，数据库不能访问存储，导致实例down了
4、
启动实例=>srvctl start instance -d trsendb -i trsendb1;
relocate服务=>srvctl relocate service -d trsendb -s xxx -i trsendb2 -t trsendb1;
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