Solving Common JDBC Problems with MySQL

Solving Common JDBC Problems with MySQL

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時間：2019-07-03

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1、1Copyright?2011,Oracleand/oritsaffiliates.Allrightsreserved.InsertInformationProtectionPolicyClassificationfromSlide8SolvingCommonJDBCProblemswithMySQLToddFarmer2Copyright?2011,Oracleand/oritsaffiliates.Allrightsreserved.InsertInformationProtectionPolicyClassif

2、icationfromSlide8ProgramAgenda?Commonproblems?RecommendedConfigurations?HighAvailability?LoadDistribution?ExtensionPoints?DebuggingMySQLJDBCIssues3Copyright?2011,Oracleand/oritsaffiliates.Allrightsreserved.InsertInformationProtectionPolicyClassificationfromSlid

3、e8CommonProblems?ClasspathExceptions?CommunicationExceptions?Auto-reconnect4Copyright?2011,Oracleand/oritsaffiliates.Allrightsreserved.InsertInformationProtectionPolicyClassificationfromSlide8CommonProblemsClasspathExceptions?Mostcommonproblemseeninforums?java.

4、lang.ClassNotFoundException:com.mysql.jdbc.Driver?KnowwhereyourapplicationserverexpectstofindJARfiles–Ifusingservercomponents(e.g.,JDBCRealmsinTomcat)makesureJARfileisincommonlib5Copyright?2011,Oracleand/oritsaffiliates.Allrightsreserved.InsertInformationProtec

5、tionPolicyClassificationfromSlide8CommonProblemsCommunicationException?Verycommonproblem?Mostoftencausedby:–Reusingidle(orevenclosed)connectionswithoutcheckingstate–Networkproblems–MySQLServerornetworkconfiguration?Connector/JandServerrelyonTCP-levelkeepalive–W

6、hennotactivelyexecutingcommands,connectioncanappear“dead”toroutersandfirewalls6Copyright?2011,Oracleand/oritsaffiliates.Allrightsreserved.InsertInformationProtectionPolicyClassificationfromSlide8CommonProblemsCommunicationExceptions-Debugging?Upgrade!Versionsgr

7、eaterthan5.1.13haveadditionaldiagnosticinformationinerrormessage7Copyright?2011,Oracleand/oritsaffiliates.Allrightsreserved.InsertInformationProtectionPolicyClassificationfromSlide8CommonProblemsCommunicationExceptions-Debugging?Upgrade!Versionsgreaterthan5.1.1

8、3haveadditionaldiagnosticinformationinerrormessagecom.mysql.jdbc.exceptions.jdbc4.CommunicationsException:CommunicationslinkfailureThelastpacketsuccessfullyreceivedfromthese

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