#Failed to resolve host sqlpro how to
#Failed to resolve host sqlpro mac os x
#Failed to resolve host sqlpro windows

#Failed to resolve host sqlpro mac os x

I think that client behaviour, as well as lower default resource limits in Mac OS X Yosemite is responsible for the increase in the number of times I was seeing this issue. The issue was resolved finally by increasing the open files limit per process from 256 files to 65536 files by following the guide at : I found that if I kept a MySQL root prompt open until I saw the error, I could perform a FLUSH TABLES command, and immediately I was able to log in again. Paul Keenan I was affected by the same issue. Sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES # Adjust sizes as needed, experiment to find the optimal values. # The server defaults are faster for transactions and fast SELECTs. # Remove leading # to set options mainly useful for reporting servers.

# These are commonly set, remove the # and set as required. # changes to the binary log between backups. # Remove leading # to turn on a very important data integrity option: logging Start at 70% of total RAM for dedicated server, else 10%. # Remove leading # and set to the amount of RAM for the most important data

#Failed to resolve host sqlpro how to

# For advice on how to change settings please see It was also seen that terminating all the mysql clients like jdbc (shutting down the app servers) also helps with the issue and you are able to login once again. [Caused by: java.io.EOFException: unexpected end of stream, read 0bytes from 4Īt .readFully(ReadUtil.java:84) Īt .readFully(ReadUtil.java:92) Īt .(RawPacket.java:77) Īt .(SyncPacketFetcher.java:67) Īt .(MySQLProtocol.java:468) Īlso observed that bouncing the mysql instance clears up the problem. The counter 'Aborted_connects' keeps increasing.įrom the JDBC side, tested this with the recent connector/j and mariadb java client and both fail with similar exceptions: | HOST | CURRENT_CONNECTIONS | TOTAL_CONNECTIONS | This could also be seen under the performance schema where the HOST is seen as NULL while multiple clients try to connect: The interesting piece of trace being 'login_connection: info: Host: unknown host ip: 127.0.0.1' where it sees the host as 'unknown host' which appears to be the cause of the authentication error. Net_send_eof: info: EOF sent, so no more error sending allowed] Handle_select: info: res: 0 report_error: 0 THD::decide_logging_format: info: decision: no logging since mysql_bin_log.is_open() = 0 and (options & OPTION_BIN_LOG) = 0x40000 and binlog_format = 1 and binlog_filter->db_ok(db) = 1 THD::decide_logging_format: info: lex->get_stmt_unsafe_flags(): 0x0 THD::decide_logging_format: info: variables.binlog_format: 1 THD::decide_logging_format: info: query: SELECT 1 Setup_conds: info: thd->mark_used_columns: 1 Setup_fields: info: thd->mark_used_columns: 1 One_thread_per_connection_end: info: Blocking pthread for reuseĭo_command: info: Command on TCP/IP (32) = 3 (Query)ĭispatch_command: info: packet: '' command: 3 One_thread_per_connection_end: info: remove_global_thread 0x7f824d245200 current_linfo 0x0 Intern_plugin_unlock: info: unlocking plugin, name= InnoDB, ref_count= 561 Intern_plugin_unlock: info: unlocking plugin, name= InnoDB, ref_count= 562 Trans_rollback: info: clearing SERVER_STATUS_IN_TRANS One_thread_per_connection_end: info: thd 0x7f824d245200 block_pthread 1 My_message_sql: error: error: 1043 message: 'Bad handshake' My_message_sql: error: error: 1158 message: 'Got an error reading communication packets' Login_connection: info: Host: unknown host ip: 127.0.0.1Īcl_authenticate: info: com_change_user_pkt_len=0 Login_connection: info: New connection received on TCP/IP (1089) [login_connection: info: login_connection called by thread 11

Running mysql under debug (mysql-dubug) and generating a trace shows the below when the issue occurs: While the dump is being sourced other mysql client(s) trying to connect (even if it were a different user than the one running the import) you get the authentication error.ĮRROR 2013 (HY000): Lost connection to MySQL server at 'sending authentication information', system error: 32'Īlso observed that passing in the host causes mysql to throw a different exception:ĮRROR 2013 (HY000): Lost connection to MySQL server at 'reading authorization packet', system error: 0' This was tested and the issue was repeatable with a simple database import through the mysql client.The database dump had around 1000 tables and 200 MB in size.

#Failed to resolve host sqlpro windows

The issue is not seen on windows or other unix servers like centos. Under heavy workload mysql 5.6.16 (replicated on 5.6.13 and higher) throws connection errors 'Lost connection to MySQL server at 'sending authentication information', system error: 32'.