C#MySql不定时出现Unable to connect to any of the specified MySQL hosts [问题点数:40分]

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ORA-12203 TNS:unable to connect to destination
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unable to connect to any of the specified MySQL hosts
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mysql 0x80004005 unable to connect to any of the specified mysql hosts
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Error: java.io.IOException: Unable to initialize any output collector
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Error:java.io.IOException:unable to initialize any output collector
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MySQL笔记(不定时更新)
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ORA-12154: TNS:could not resolve the connect identifier specified
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oracle-12154 TNS:cound not resolve the connect identifier specified
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TNS:could not resolve the connect identifier specified
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运行项目时出现Unable to connect to the ASP.NET Development Server
希望能够得到解决
connect to server"问题。">求助:CentOS下的mssql_connect()连接问题,出现"Unable to connect to server"问题。
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夜神模拟器连接eclipse时候出现unable to connect解决方案
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ORA-12154:could not resolve the connect identifier specified
又折腾了一上午了,又发现新问题了;rn新手真痛苦啊rnrn昨天的一台机器能成功配置 ,今天公司的服务器上不行了;配置文件如下:rnrn# listener.ora Network Configuration File: D:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.orarn# Generated by Oracle configuration tools.rnrnSID_LIST_LISTENER =rn (SID_LIST =rn (SID_DESC =rn (SID_NAME = orcl)rn (ORACLE_HOME = D:\app\Administrator\product\11.2.0\dbhome_1)rn (PROGRAM = extproc)rn )rn )rn)rnrnLISTENER =rn (DESCRIPTION_LIST =rn (DESCRIPTION =rn (ADDRESS_LIST =rn (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))rn )rn (DESCRIPTION =rn (ADDRESS_LIST =rn (ADDRESS = (PROTOCOL =TCP)(HOST =192.168.5.100)(PORT=1521))rn )rn )rn )rnrnrnrn# tnsnames.ora Network Configuration File: D:\app\Administrator\product\11.2.0\dbhome_1\network\admin\tnsnames.orarn# Generated by Oracle configuration tools.rnORCL =rn (DESCRIPTION = rn (ADDRESS_LIST =rn (ADDRESS = (PROTOCOL = TCP)(HOST =192.168.5.100)(PORT =1521))rn )rn (CONNECT_DATA =rn (SERVER=DEDICATED) rn (SID=orcl)rn )rn )rnrnrn rn[color=#FF0000]C:\>tnsping orcl[/color]rnTNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 14-2月 -rn2012 12:16:39rnrnCopyright (c) 1997, 2010, Oracle. All rights reserved.rnrn已使用的参数文件:rnD:\app\Administrator\product\11.2.0\dbhome_1\network\admin\sqlnet.orarnrnrn已使用 TNSNAMES 适配器来解析别名rn尝试连接 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.5.100)(PORT =rn 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)))rnOK (10 毫秒)rnrnrnrn[color=#FF0000]rnC:\>lsnrctl status[/color]rnLSNRCTL for 32-bit Windows: Version 11.2.0.1.0 - Production on 14-2月 -2012 12:1rn7:18rnrnCopyright (c) 1991, 2010, Oracle. All rights reserved.rnrn正在连接到 (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))rnLISTENER 的 STATUSrn------------------------rn别名 LISTENERrn版本 TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Produrnctionrn启动日期 14-2月 -2012 12:10:42rn正常运行时间 0 天 0 小时 6 分 36 秒rn跟踪级别 offrn安全性 ON: Local OS AuthenticationrnSNMP OFFrn监听程序参数文件 D:\app\Administrator\product\11.2.0\dbhome_1\network\arndmin\listener.orarn监听程序日志文件 d:\app\administrator\diag\tnslsnr\hb\listener\alert\lorng.xmlrn监听端点概要...rn (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=hb)(PORT=1521)))rn服务摘要..rn服务 "orcl" 包含 1 个实例。rn 实例 "orcl", 状态 UNKNOWN, 包含此服务的 1 个处理程序...rn服务 "orcl.wx.hbsoft.zj" 包含 1 个实例。rn 实例 "orcl", 状态 READY, 包含此服务的 1 个处理程序...rn服务 "orclXDB.wx.hbsoft.zj" 包含 1 个实例。rn 实例 "orcl", 状态 READY, 包含此服务的 1 个处理程序...rn命令执行成功rnrnC:\>rn
ORA-12154: TNS:could not resolve the connect idendifier specified
情形:rn通过Net Configuration Assistant 进行本地Net服务名测试均测试通过,可是用SQLplus和PL/SQL developer或者用命令行链接都错误rnORA-12154: TNS:could not resolve the <em>connect</em> idendifier <em>specified</em> , 这是为什么呢 ?rnrntnsnames.ora 为:rn[code=SQL]rn# tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\tnsnames.orarn# Generated by Oracle configuration tools.rnrncog =rn (DESCRIPTION =rn (ADDRESS_LIST =rn (ADDRESS = (PROTOCOL = TCP)(HOST = 10.225.106.30)(PORT = 1521))rn )rn (CONNECT_DATA =rn (SERVICE_NAME = cog)rn )rn )rn rnorcl =rn (DESCRIPTION =rn (ADDRESS_LIST =rn (ADDRESS = (PROTOCOL = TCP)(HOST = 10.225.106.30)(PORT = 1521))rn )rn (CONNECT_DATA =rn (SERVICE_NAME = orcl)rn )rn ) rn[/code]rnrnlistner.ora 为rn[code=SQL]rnSID_LIST_LISTENER =rn (SID_LIST =rn (SID_DESC =rn (SID_NAME = PLSExtProc)rn (ORACLE_HOME = C:\oracle\product\10.2.0\client_1)rn (PROGRAM = extproc)rn (GLOBAL_DBNAME = orcl)rn (ORACLE_HOME = C:\oracle\product\10.2.0\client_1)rn (SID_NAME = orcl)rn (GLOBAL_DBNAME = cog)rn (ORACLE_HOME = C:\oracle\product\10.2.0\client_1)rn (SID_NAME = cog)rn )rn )rnrnLISTENER =rn (DESCRIPTION_LIST =rn (DESCRIPTION =rn (ADDRESS = (PROTOCOL = TCP)(HOST = 10.225.106.30)(PORT = 1521))rn )rn )rnrn[/code]
间断性出现Can not connect to MySQL server
向各位高手求教: rnrnIIS+php+<em>mysql</em>。 rnIIS为win2003,<em>mysql</em>为AS4,在一个千兆局域网内。 rnrnmy.cnf: rn[<em>mysql</em>d] rnport = 3306 rnsocket = /tmp/<em>mysql</em>.sock rnskip-locking rnskip-name-resolve rnkey_buffer = 700M rnmax_allowed_packet = 4M rntable_cache = 1536 rn#sort_buffer_size = 16M rnsort_buffer_size = 32M rnnet_buffer_length =2M rnread_buffer_size = 4M rnread_rnd_buffer_size = 4M rnmyisam_sort_buffer_size = 64M rnmax_<em>connect</em>ions=1000 rnquery_cache_size=128M rnthread_cache_size=400 rntmp_table_size = 128M rnwait_timeout=10 rnrn运行15小时后:rnshow status: rn¦ Aborted_clients ¦ 2868 ¦ rn¦ Aborted_<em>connect</em>s ¦ 29 ¦ rn¦ Binlog_cache_disk_use ¦ 0 ¦ rn¦ Binlog_cache_use ¦ 0 ¦ rn¦ Bytes_received ¦ 192 ¦ rn¦ Bytes_sent ¦ 13361 ¦ rn¦ Com_admin_commands ¦ 0 ¦ rn. rn. rn. rn¦ Com_select ¦ 1 ¦ rn¦ Com_set_option ¦ 0 ¦ rn¦ Com_show_status ¦ 5 ¦ rn¦ Compression ¦ OFF ¦ rn. rn. rn. rn¦ Connections ¦ 1177715 ¦ rn¦ Created_tmp_disk_tables ¦ 0 ¦ rn¦ Created_tmp_files ¦ 767 ¦ rn¦ Created_tmp_tables ¦ 3 ¦ rn¦ Delayed_errors ¦ 0 ¦ rn¦ Delayed_insert_threads ¦ 0 ¦ rn¦ Delayed_writes ¦ 0 ¦ rn¦ Flush_commands ¦ 1 ¦ rn. rn. rn. rn¦ Handler_read_rnd_next ¦ 508 ¦ rn¦ Handler_rollback ¦ 0 ¦ rn¦ Handler_savepoint ¦ 0 ¦ rn¦ Handler_savepoint_rollback ¦ 0 ¦ rn¦ Handler_update ¦ 0 ¦ rn¦ Handler_write ¦ 638 ¦ rn¦ Innodb_buffer_pool_pages_data ¦ 19 ¦ rn¦ Innodb_buffer_pool_pages_dirty ¦ 0 ¦ rn¦ Innodb_buffer_pool_pages_flushed ¦ 0 ¦ rn¦ Innodb_buffer_pool_pages_free ¦ 493 ¦ rn¦ Innodb_buffer_pool_pages_latched ¦ 0 ¦ rn¦ Innodb_buffer_pool_pages_misc ¦ 0 ¦ rn¦ Innodb_buffer_pool_pages_total ¦ 512 ¦ rn¦ Innodb_buffer_pool_read_ahead_rnd ¦ 1 ¦ rn¦ Innodb_buffer_pool_read_ahead_seq ¦ 0 ¦ rn¦ Innodb_buffer_pool_read_requests ¦ 77 ¦ rn¦ Innodb_buffer_pool_reads ¦ 12 ¦ rn¦ Innodb_buffer_pool_wait_free ¦ 0 ¦ rn¦ Innodb_buffer_pool_write_requests ¦ 0 ¦ rn¦ Innodb_data_fsyncs ¦ 3 ¦ rn¦ Innodb_data_pending_fsyncs ¦ 0 ¦ rn¦ Innodb_data_pending_reads ¦ 0 ¦ rn¦ Innodb_data_pending_writes ¦ 0 ¦ rn¦ Innodb_data_read ¦ 2494464 ¦ rn¦ Innodb_data_reads ¦ 25 ¦ rn¦ Innodb_data_writes ¦ 3 ¦ rn¦ Innodb_data_written ¦ 1536 ¦ rn¦ Innodb_dblwr_pages_written ¦ 0 ¦ rn¦ Innodb_dblwr_writes ¦ 0 ¦ rn¦ Innodb_log_waits ¦ 0 ¦ rn¦ Innodb_log_write_requests ¦ 0 ¦ rn¦ Innodb_log_writes ¦ 1 ¦ rn¦ Innodb_os_log_fsyncs ¦ 3 ¦ rn¦ Innodb_os_log_pending_fsyncs ¦ 0 ¦ rn¦ Innodb_os_log_pending_writes ¦ 0 ¦ rn¦ Innodb_os_log_written ¦ 512 ¦ rn¦ Innodb_page_size ¦ 16384 ¦ rn¦ Innodb_pages_created ¦ 0 ¦ rn¦ Innodb_pages_read ¦ 19 ¦ rn¦ Innodb_pages_written ¦ 0 ¦ rn¦ Innodb_row_lock_current_waits ¦ 0 ¦ rn¦ Innodb_row_lock_time ¦ 0 ¦ rn¦ Innodb_row_lock_time_avg ¦ 0 ¦ rn¦ Innodb_row_lock_time_max ¦ 0 ¦ rn¦ Innodb_row_lock_waits ¦ 0 ¦ rn¦ Innodb_rows_deleted ¦ 0 ¦ rn¦ Innodb_rows_inserted ¦ 0 ¦ rn¦ Innodb_rows_read ¦ 0 ¦ rn¦ Innodb_rows_updated ¦ 0 ¦ rn¦ Key_blocks_not_flushed ¦ 0 ¦ rn¦ Key_blocks_unused ¦ 402625 ¦ rn¦ Key_blocks_used ¦ 233053 ¦ rn¦ Key_read_requests ¦ 217142621 ¦ rn¦ Key_reads ¦ 240786 ¦ rn¦ Key_write_requests ¦ 745593 ¦ rn¦ Key_writes ¦ 730218 ¦ rn¦ Last_query_cost ¦ 0.000000 ¦ rn¦ Max_used_<em>connect</em>ions ¦ 269 ¦ rn¦ Ndb_cluster_node_id ¦ 0 ¦ rn¦ Ndb_config_from_host ¦ ¦ rn¦ Ndb_config_from_port ¦ 0 ¦ rn¦ Ndb_number_of_data_nodes ¦ 0 ¦ rn¦ Not_flushed_delayed_rows ¦ 0 ¦ rn¦ Open_files ¦ 1717 ¦ rn¦ Open_streams ¦ 0 ¦ rn¦ Open_tables ¦ 1536 ¦ rn¦ Opened_tables ¦ 0 ¦ rn¦ Prepared_stmt_count ¦ 0 ¦ rn¦ Qcache_free_blocks ¦ 10830 ¦ rn¦ Qcache_free_memory ¦ 111468376 ¦ rn¦ Qcache_hits ¦ 2042098 ¦ rn¦ Qcache_inserts ¦ 2912582 ¦ rn¦ Qcache_lowmem_prunes ¦ 0 ¦ rn¦ Qcache_not_cached ¦ 193594 ¦ rn¦ Qcache_queries_in_cache ¦ 16671 ¦ rn¦ Qcache_total_blocks ¦ 44305 ¦ rn¦ Questions ¦ 10613361 ¦ rn¦ Rpl_status ¦ NULL ¦ rn¦ Select_full_join ¦ 0 ¦ rn¦ Select_full_range_join ¦ 0 ¦ rn¦ Select_range ¦ 0 ¦ rn¦ Select_range_check ¦ 0 ¦ rn¦ Select_scan ¦ 3 ¦ rn¦ Slave_open_temp_tables ¦ 0 ¦ rn¦ Slave_retried_transactions ¦ 0 ¦ rn¦ Slave_running ¦ OFF ¦ rn. rn. rn. rn¦ Ssl_session_cache_mode ¦ NONE ¦ rn¦ Ssl_session_cache_overflows ¦ 0 ¦ rn¦ Ssl_session_cache_size ¦ 0 ¦ rn¦ Ssl_session_cache_timeouts ¦ 0 ¦ rn¦ Ssl_sessions_reused ¦ 0 ¦ rn¦ Ssl_used_session_cache_entries ¦ 0 ¦ rn¦ Ssl_verify_depth ¦ 0 ¦ rn¦ Ssl_verify_mode ¦ 0 ¦ rn¦ Ssl_version ¦ ¦ rn¦ Table_locks_immediate ¦ 7248667 ¦ rn¦ Table_locks_waited ¦ 81875 ¦ rn¦ Tc_log_max_pages_used ¦ 0 ¦ rn¦ Tc_log_page_size ¦ 0 ¦ rn¦ Tc_log_page_waits ¦ 0 ¦ rn¦ Threads_cached ¦ 260 ¦ rn¦ Threads_<em>connect</em>ed ¦ 9 ¦ rn¦ Threads_created ¦ 269 ¦ rn¦ Threads_running ¦ 2 ¦ rn¦ Uptime ¦ 54230 ¦ rn¦ Uptime_since_flush_status ¦ 54230 ¦ rn+-----------------------------------+-----------+ rnrn补充说明:大约每小时<em>出现</em>2次左右Can not <em>connect</em> to MySQL server。报2003错.
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老是解决不了:Unable to connect with connect string: nodeid=0,localhost:1186
rn我下载了<em>mysql</em>-cluster-gpl-noinstall-7.1.9a-win32免安装版做<em>mysql</em> cluster,在启动数据节点时<em>出现</em>了无法连接的情况:rnbin> ndbd --initialrnUnable to <em>connect</em> with <em>connect</em> string: nodeid=0,localhost:1186rnRetrying every 5 seconds. Attempts left: 12 11 10 9 8 7 6 5 4 3 2 1, failed.rn2010-12-07 17:04:22 [ndbd] ERROR -- Could not <em>connect</em> to management server, ernrror: ''rnrn我的过程是这样的:rn(1) 管理节点的配置rnrn 创建文件夹:c:\<em>mysql</em>rn c:\<em>mysql</em>\bin (并将 ndb_mgmd.exe 和 ndb_mgm.exe 复制进去)rn c:\<em>mysql</em>\bin\cluster-logsrn 在 c:\<em>mysql</em>\bin 下创建两个文件 conf.ini、my.inirnrn config.ini配置如下:rnrn[ndbd default]rnNoOfReplicas=2rnDataMemory=200MrnIndexMemory=100Mrnrn[TCP DEFAULT]rnrn[NDB_MGMD]rnnodeid=1rnhostname=172.16.3.27rndatadir=D:\Program Files\<em>mysql</em>cluster\datanode\<em>mysql</em>\bin\cluster-datarnrn[NDBD]rnnodeid=2rnhostname=172.16.3.28rndatadir=C:\<em>mysql</em>\<em>mysql</em>-clusterrnrn[NDBD]rnnodeid=3rnhostname=172.16.3.30rndatadir=C:\<em>mysql</em>\<em>mysql</em>-clusterrnrn[MySQLD]rn[MySQLD]rnrnmy.ini配置如下:rnrn[<em>mysql</em>_cluster]rnconfig-file=C:\<em>mysql</em>\bin\config.inirnrn(2)数据节点和sql节点的配置(数据节点和sql节点为同一台机)rn 建文件夹: D:/Program Files/<em>mysql</em>cluster/datanode/<em>mysql</em>/bin (并将ndbd.exe放进去)rn D:/Program Files/<em>mysql</em>cluster/datanode/<em>mysql</em>/cluster-datarn D:/Program Files/<em>mysql</em>cluster/datanode/<em>mysql</em>/bin/cluster-datarn D:/Program Files/<em>mysql</em>cluster/sqlnode (将解压后的整个文件夹<em>mysql</em>放进去)rnrn 在D:/Program Files/<em>mysql</em>cluster/datanode/<em>mysql</em>/bin目录下生成文件my.ini,内容为:rnrn [<em>mysql</em>_cluster]rn ndb-<em>connect</em>string=172.16.3.27rnrn 在D:/Program Files/<em>mysql</em>cluster/sqlnode/<em>mysql</em>下生成my.ini文件,内容为:rn [<em>mysql</em>d]rn ndbclusterrn ndb-<em>connect</em>string=172.16.3.27rnrn(3)启动管理节点rnc:\<em>mysql</em>\bin>ndb_mgmd -f conf.inirnMySQL Cluster Management Server <em>mysql</em>-5.1.51 ndb-7.1.9rnrnc:\<em>mysql</em>\bin>ndb_mgm -e showrnConnected to Management Server at: localhost:1186rnCluster Configurationrn---------------------rn[ndbd(NDB)] 2 node(s)rnid=2 (not <em>connect</em>ed, accepting <em>connect</em> from 172.16.3.28)rnid=3 (not <em>connect</em>ed, accepting <em>connect</em> from 172.16.3.30)rnrn[ndb_mgmd(MGM)] 1 node(s)rnid=1 @172.16.3.27 (<em>mysql</em>-5.1.51 ndb-7.1.9)rnrn[<em>mysql</em>d(API)] 3 node(s)rnid=4 (not <em>connect</em>ed, accepting <em>connect</em> from <em>any</em> host)rnid=5 (not <em>connect</em>ed, accepting <em>connect</em> from <em>any</em> host)rnrn(4) 启动数据节点rnD:\Program Files\<em>mysql</em>cluster\datanode\<em>mysql</em>\bin>ndbd --initialrnUnable to <em>connect</em> with <em>connect</em> string: nodeid=0,localhost:1186rnRetrying every 5 seconds. Attempts left: 12 11 10rnrn数据节点连接不上,在管理节点上运行ndb_mgmrnc:\<em>mysql</em>\bin>ndb_mgmrn-- NDB Cluster -- Management Client --rnndb_mgm> showrnConnected to Management Server at: localhost:1186rnCluster Configurationrn---------------------rn[ndbd(NDB)] 2 node(s)rnid=2 (not <em>connect</em>ed, accepting <em>connect</em> from 172.16.3.28)rnid=3 (not <em>connect</em>ed, accepting <em>connect</em> from 172.16.3.30)rnrn[ndb_mgmd(MGM)] 1 node(s)rnid=1 @172.16.3.27 (<em>mysql</em>-5.1.51 ndb-7.1.9)rnrn[<em>mysql</em>d(API)] 3 node(s)rnid=4 (not <em>connect</em>ed, accepting <em>connect</em> from <em>any</em> host)rnid=5 (not <em>connect</em>ed, accepting <em>connect</em> from <em>any</em> host)rnid=6 (not <em>connect</em>ed, accepting <em>connect</em> from <em>any</em> host)rnrnndb_mgm> <em>connect</em> 172.16.3.28rnUnable to <em>connect</em> with <em>connect</em> string: nodeid=0,172.16.3.28:1186rnRetrying every 5 seconds. Attempts left: 2rnrn管理节点和数据节点互相 <em>connect</em> 不上 (防火墙关了,终端互相ping通)rnrn望高手指点,在线等待!!!rn
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