堆棧內存溢出
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API 服務每隔一個請求工作一次

[英]API service works every second request

 原文  2013-02-22 16:07:04  3   3    java/ android/ mysql/ hibernate

問題描述

我對 jax-rs REST 服務有問題。

服務運行不正常。 每隔一秒請求服務就會拋出異常：

HTTP Status 500 - could not execute query

type Exception report

message could not execute query

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.hibernate.exception.JDBCConnectionException: could not execute query
    org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)
    org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
    org.hibernate.loader.Loader.doList(Loader.java:2147)
    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2028)
    org.hibernate.loader.Loader.list(Loader.java:2023)
    org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
    org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    com.fit.utilities.BaseDAO.getAll_fetchEager(BaseDAO.java:62)
    com.fit.utilities.BaseDAO.getAll(BaseDAO.java:37)
    com.fit.servis.Korisnik_servis.PronadjiPrijatelje(Korisnik_servis.java:174)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    java.lang.reflect.Method.invoke(Unknown Source)
    com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
    com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
    com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353)
    com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.Connection was implicitly closed by the driver.
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    java.lang.reflect.Constructor.newInstance(Unknown Source)
    com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
    com.mysql.jdbc.Util.getInstance(Util.java:384)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
    com.mysql.jdbc.SQLError.createSQLException(SQLError.java:929)
    com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1204)
    com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1191)
    com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:4276)
    com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:4242)
    org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:497)
    org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:415)
    org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
    org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1560)
    org.hibernate.loader.Loader.doQuery(Loader.java:661)
    org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
    org.hibernate.loader.Loader.doList(Loader.java:2144)
    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2028)
    org.hibernate.loader.Loader.list(Loader.java:2023)
    org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
    org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    com.fit.utilities.BaseDAO.getAll_fetchEager(BaseDAO.java:62)
    com.fit.utilities.BaseDAO.getAll(BaseDAO.java:37)
    com.fit.servis.Korisnik_servis.PronadjiPrijatelje(Korisnik_servis.java:174)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    java.lang.reflect.Method.invoke(Unknown Source)
    com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
    com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
    com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353)
    com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 22.477.953 milliseconds ago.  The last packet sent successfully to the server was 22.478.000 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    java.lang.reflect.Constructor.newInstance(Unknown Source)
    com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
    com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1122)
    com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3317)
    com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1941)
    com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2114)
    com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2696)
    com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2105)
    com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2264)
    org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
    org.hibernate.loader.Loader.getResultSet(Loader.java:1668)
    org.hibernate.loader.Loader.doQuery(Loader.java:662)
    org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
    org.hibernate.loader.Loader.doList(Loader.java:2144)
    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2028)
    org.hibernate.loader.Loader.list(Loader.java:2023)
    org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
    org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    com.fit.utilities.BaseDAO.getAll_fetchEager(BaseDAO.java:62)
    com.fit.utilities.BaseDAO.getAll(BaseDAO.java:37)
    com.fit.servis.Korisnik_servis.Login(Korisnik_servis.java:32)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    java.lang.reflect.Method.invoke(Unknown Source)
    com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
    com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
    com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353)
    com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

java.net.SocketException: Software caused connection abort: socket write error
    java.net.SocketOutputStream.socketWrite0(Native Method)
    java.net.SocketOutputStream.socketWrite(Unknown Source)
    java.net.SocketOutputStream.write(Unknown Source)
    java.io.BufferedOutputStream.flushBuffer(Unknown Source)
    java.io.BufferedOutputStream.flush(Unknown Source)
    com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3298)
    com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1941)
    com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2114)
    com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2696)
    com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2105)
    com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2264)
    org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
    org.hibernate.loader.Loader.getResultSet(Loader.java:1668)
    org.hibernate.loader.Loader.doQuery(Loader.java:662)
    org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
    org.hibernate.loader.Loader.doList(Loader.java:2144)
    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2028)
    org.hibernate.loader.Loader.list(Loader.java:2023)
    org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95)
    org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    com.fit.utilities.BaseDAO.getAll_fetchEager(BaseDAO.java:62)
    com.fit.utilities.BaseDAO.getAll(BaseDAO.java:37)
    com.fit.servis.Korisnik_servis.Login(Korisnik_servis.java:32)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    java.lang.reflect.Method.invoke(Unknown Source)
    com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
    com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
    com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353)
    com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.32 logs.

Apache Tomcat/7.0.32

服務檢索 JSON..我認為問題是由於字節字符串的大小造成的。

成功響應示例：

[{
    "id": 2,
    "name": "haris",
    "surname": null,
    "gender": null,
    "age": null,
    "birthdate": null,
    "password": "1234",
    "username": "haris",
    "isOnline": null,
    "picture": "YORp0a9HAkEbrPYu2RcNwB4ExIMdvoD5/3uBgoz1"
}]

3 個解決方案

解決方案1
 1 已采納  2013-02-22 16:10:15

問題出在您的 mysql 數據源配置中。 嘗試將這兩個參數添加到數據源定義中：

 testOnBorrow="true" validationQuery="select 1"

解決方案2
 1  2013-02-22 16:11:20

我想這是服務器端的問題。 它清楚地可見您的類BaseDAO在此方法中執行方法getAll_fetchEager您正在執行一些由於某種原因而失敗的條件查詢。 我相信如果您更正您的標准查詢問題將得到解決。 嘗試找出正確設置的連接屬性，並且您能夠連接您的數據庫。

解決方案3
 1  2013-02-22 16:13:08

我認為答案在堆棧跟蹤中。

從服務器成功接收的最后一個數據包是 22.477.953 毫秒前。 最后一個成功發送到服務器的數據包是 22.478.000 毫秒前。 比服務器配置的“wait_timeout”值長。 您應該考慮在應用程序中使用之前使連接有效性過期和/或測試連接有效性，增加客戶端超時的服務器配置值，或使用連接器/J 連接屬性“autoReconnect=true”來避免此問題。

與您的mysql的連接未保持打開狀態，也未設置為自動重新連接。

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