9
मैं यह त्रुटि (इतनी बार नहीं) हो रही है:एसक्यूएल त्रुटि: 0, SQLState: 08S01 संचार लिंक विफलता
2013-05-08 16:44:35,786 WARN (JDBCExceptionReporter.java:100) [org.hibernate.util.JDBCExceptionReporter, logExceptions] - SQL Error: 0, SQLState: 08S01
2013-05-08 16:44:35,786 ERROR (JDBCExceptionReporter.java:101) [org.hibernate.util.JDBCExceptionReporter, logExceptions] - Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
2013-05-08 16:44:35,833 ERROR (AdminDaoImpl.java:297) [com.myapp.admin.db.AdminDaoImpl, createFilePackage] - data-upload: Exception while adding new file package
org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:97) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354) [hibernate-core-3.3.2.GA.jar:3.3.2.GA]
at com.myapp.admin.db.AdminDaoImpl. createFilePackage(AdminDaoImpl.java:182) [AdminDaoImpl.class:na]
at com.myapp.admin.ctrl.UploadController.processUploadZip(UploadController.java:217) [UploadController.class:na]
at sun.reflect.GeneratedMethodAccessor106.invoke(Unknown Source) [na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [na:1.6.0_35]
at java.lang.reflect.Method.invoke(Method.java:597) [na:1.6.0_35]
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:212) [spring-web-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126) [spring-web-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789) [spring-webmvc-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) [servlet-api.jar:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) [servlet-api.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) [catalina.jar:7.0.35]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.35]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) [catalina.jar:7.0.35]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) [catalina.jar:7.0.35]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [catalina.jar:7.0.35]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) [catalina.jar:7.0.35]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) [catalina.jar:7.0.35]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) [catalina.jar:7.0.35]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) [catalina.jar:7.0.35]
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200) [tomcat-coyote.jar:7.0.35]
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) [tomcat-coyote.jar:7.0.35]
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) [tomcat-coyote.jar:7.0.35]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [na:1.6.0_35]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [na:1.6.0_35]
at java.lang.Thread.run(Thread.java:662) [na:1.6.0_35]
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
मैं दो वेब (वसंत MVC + हाइबरनेट + mysql) है साझा सर्वर पर होस्ट अनुप्रयोगों:
1) मुख्य एप्लिकेशन डाउनलोड के लिए फ़ाइलें (जो व्यवस्थापक ऐप के माध्यम से डाला जाता है)
2) CRUD संचालन
यह त्रुटि कुछ समय दिखाई देता है साथ व्यवस्थापक ऐप्स को दिखाने के लिए, जब मैं उसी हूँ "मुख्य" ऐप के लिए फ़ाइलों को अपलोड करने के लिए एनजी "एडमिन" एप्लिकेशन, कहें कि 100-120 फाइलों/अनुरोधों को सफलतापूर्वक अपलोड/प्रसंस्करण के बाद और 10-20 डालने/अपडेट क्वेरी के साथ डेटाबेस को मारने के प्रत्येक अनुरोध पर हो सकता है।
होस्टिंग विवरण:
Private tomcat hosting
java 1.6.0_35-b10
tomcat 7.0.35
heap size 288MB
MySQL Server 5
commons-dbcp 1.2.2
mysql-connector-java 5.1.9
डाटाबेस + हाइबरनेट + DBCP गुण:
<bean id="dbDataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="username" value="test" />
<property name="password" value="test" />
<property name="url" value="jdbc:mysql://localhost/my_database?useUnicode=yes&characterEncoding=UTF-8" />
<!-- DBCP Connection Pool Settings -->
<property name="defaultAutoCommit" value="true" />
<property name="initialSize" value="10" />
<property name="maxActive" value="500" />
<property name="maxIdle" value="8" />
<property name="minIdle" value="0" />
<property name="maxWait" value="30000" />
<property name="validationQuery" value="SELECT 1" />
<property name="testOnBorrow" value="true" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="false" />
<property name="timeBetweenEvictionRunsMillis" value="-1" />
<property name="numTestsPerEvictionRun" value="3" />
<property name="minEvictableIdleTimeMillis" value="180000" />
<property name="poolPreparedStatements" value="true" />
<property name="maxOpenPreparedStatements" value="25" />
<property name="accessToUnderlyingConnectionAllowed" value="false" />
<property name="removeAbandoned" value="false" />
<property name="removeAbandonedTimeout" value="300" />
<property name="logAbandoned" value="false" />
</bean>
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.hbm2ddl.auto=none
hibernate.jdbc.batch_size=100
hibernate.show_sql=false
hibernate.format_sql=false
hibernate.cache.use_second_level_cache=true
hibernate.cache.use_query_cache=false
hibernate.cache.provider_class=org.hibernate.cache.NoCacheProvider
hibernate.current_session_context_class=thread
चिंतित कोड:
public String createFilePackage(FilePackage package) {
String message = "";
Session session = getSessionFactory().openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
// handling package, around 10-14 DB insert, 10 SELECT and 5 update queries on same session
tx.commit();
} catch(Exception e) {
logger.error("file-upload: Exception while adding new font package", e);
if(tx != null) { tx.rollback(); }
} finally {
session.close();
}
return message;
}
किसी भी इस समस्या को हल करने के लिए कैसे की सलाह?
देखो। देखें कि उनमें कुछ ऐसा है कि यह समझाने के लिए कि कनेक्शन अप्रत्याशित रूप से क्यों गिराए जा रहे हैं। –
यह एक लेनदेन टाइमआउट हो सकता है? – Tobia