JDBC连接突然开始检查严格类型，并使用不兼容类型抛出java.sql.SQLException

Question

从Java执行简单的COUNT(*)存储过程时遇到间歇性问题。我下面的java.sql.SQLException具有不兼容的类型。请参见示例存储过程，该过程除COUNT(*)之外没有做其他事情。

奇怪的是，下面的异常不会一直发生，而只会在一段时间后发生。请注意，以下过程中的COUNT始终会返回非常小的值，例如40或50。实际上，它永远不会返回3位数字，因此应为整数。

我不明白的是，如果它是实际的数据类型不匹配，那么为什么它有时会工作并且突然停止工作而数据库上没有任何数据更新。

因此，一切现在都正常运行，几分钟后或经过几次请求后，突然一切都停止了工作。它是非常随机的，并且突然开始抛出错误，而对数据库中的数据没有任何更改。如果重新启动服务器或重新部署相同的代码而不更改数据库中的任何代码或数据，它将重新开始工作。它将在嵌入式tomcat环境中进行部署。

请检查下面的JDBC连接代码以及我在连接数据库时所做的配置。还请注意，保存该计数列的值的变量当前定义为Integer而不是Long。我可能可以通过在这里简单地更改变量类型来解决此问题，但是不确定在不理解为什么有时工作正常并突然中断的情况下进行更改。

有许多数据点会引发类似类型的类型错误，因此很难将其更改为所有类型。顺便说一句，如果我重新启动服务器或重新部署相同的代码而不更改数据库中的任何代码或数据，它将再次开始工作。

请在下面找到有时但并非总是抛出的异常。

2018-10-11T19:50:45.175782Z app[web.1]: {"remoteAddress": "172.28.","serverName": "test","remoteUser": "-","timeLocal": "11/Oct/2018:19:50:45 +0000","request": "GET /v1/test?input=ABCD&_type=json&limit=200 HTTP/1.1","status": "500","bodyBytesSent": 127,"httpReferer": "-","httpUserAgent": "-","requestTime": "0.013","upstreamCacheStatus": "MISS","httpXForwardedFor": "172.28.9.10","suuid": "-","puuid": "-","env": "PPE"}
2018-10-11T19:50:45.181112Z app[web.1]: 2018-10-11T19:50:45,178 test ERROR [http-nio-8088-exec-2,,,] com.aaa.us.test.ws.dao.DataDao: [proc_test] Failed to fetch data for input - ABCD
2018-10-11T19:50:45.181152Z app[web.1]: java.sql.SQLException: Cannot set count: incompatible types, cannot convert java.lang.Long to int Query: CALL proc_test(?); Parameters: [ABCD]
2018-10-11T19:50:45.181162Z app[web.1]:     at org.apache.commons.dbutils.AbstractQueryRunner.rethrow(AbstractQueryRunner.java:527) ~[commons-dbutils-1.7.jar!/:1.7]
2018-10-11T19:50:45.181186Z app[web.1]:     at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:391) ~[commons-dbutils-1.7.jar!/:1.7]
2018-10-11T19:50:45.1812Z app[web.1]:   at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:329) ~[commons-dbutils-1.7.jar!/:1.7]
2018-10-11T19:50:45.181213Z app[web.1]:     at com.aaa.us.test.ws.dao.getData(DataDao.java:200) [classes!/:1.0.1]
2018-10-11T19:50:45.181228Z app[web.1]:     at com.aaa.us.test.ws.DataImpl.getData(DataImpl.java:98) [classes!/:1.0.1]
2018-10-11T19:50:45.181241Z app[web.1]:     at sun.reflect.GeneratedMethodAccessor92.invoke(Unknown Source) ~[?:?]
2018-10-11T19:50:45.181252Z app[web.1]:     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_181-heroku]
2018-10-11T19:50:45.181265Z app[web.1]:     at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_181-heroku]
2018-10-11T19:50:45.181275Z app[web.1]:     at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:179) [cxf-core-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181286Z app[web.1]:     at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96) [cxf-core-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181294Z app[web.1]:     at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:192) [cxf-rt-frontend-jaxrs-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181306Z app[web.1]:     at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:103) [cxf-rt-frontend-jaxrs-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181316Z app[web.1]:     at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59) [cxf-core-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181326Z app[web.1]:     at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96) [cxf-core-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181352Z app[web.1]:     at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) [cxf-core-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181364Z app[web.1]:     at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) [cxf-core-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181376Z app[web.1]:     at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181385Z app[web.1]:     at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181396Z app[web.1]:     at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181406Z app[web.1]:     at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181414Z app[web.1]:     at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:191) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181423Z app[web.1]:     at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:301) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181432Z app[web.1]:     at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:225) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.182000+00:00 system[router]: at=info method=GET path=/v1/data?input=ABCD&_type=json&limit=10 host=test fwd="172.28.9.10" zone=va container=web.1 connect=0ms service=13ms status=500 bytes=475 request_id=e1aa4b25-f8ab-48c4-a89f-09fe9867d273
2018-10-11T19:50:45.18144Z app[web.1]:  at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181449Z app[web.1]:     at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:276) [cxf-rt-transports-http-3.2.0.jar!/:3.2.0]
2018-10-11T19:50:45.181458Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181467Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181476Z app[web.1]:     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181486Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181497Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181508Z app[web.1]:     at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110) [spring-boot-actuator-1.5.9.RELEASE.jar!/:1.5.9.RELEASE]
2018-10-11T19:50:45.181516Z app[web.1]:     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181524Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181533Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181544Z app[web.1]:     at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181553Z app[web.1]:     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181565Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181577Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181587Z app[web.1]:     at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181601Z app[web.1]:     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181612Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181622Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181633Z app[web.1]:     at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181644Z app[web.1]:     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181656Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181666Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181677Z app[web.1]:     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181688Z app[web.1]:     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181697Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181708Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.23.jar!/:8.5.23]
2018-10-11T19:50:45.181721Z app[web.1]:     at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106) [spring-boot-actuator-1.5.9.RELEASE.jar!/:1.5.9.RELEASE]
2018-10-11T19:50:45.181731Z app[web.1]:     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.14.RELEASE.jar!/:4.3.14.RELEASE]
2018-10-11T19:50:45.181742Z app[web.1]:     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.23.jar!/:8.5.23]

请注意，我们在这里使用apache dbutil commons库连接数据库。

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.ResultSetHandler;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

    try {
        QueryRunner run = new QueryRunner(readDataSource);

        ResultSetHandler<Dto> h1 = new BeanHandler(Dto.class);
        Dto data = (run.query("CALL proc_WS_GetAlpsHoldings_Metadata(?);", h1, input));

            response.setMeta(extendedMetaModel(intPage, intLimit, holdings.size(), data.getCount(), input, null, data.getDate()));

    } catch (SQLException ex) {
        log.error("[proc_test] Failed to fetch data for input - " + input, ex);
        throw new GenericException().errorCode(500).errorMessage("Failed to fetch data for input - " + input);
    }

我将count值定义为int的Dto类如下。

public class Dto {

    private String date;

    private String inceptionDate;

    private int count;

    public String getAsOfDate() {
        return asOfDate;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }
}

请在下面找到我们设置的JDBC连接池属性。

datasource:
  dbClientvendordata:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://testmysqlread.something.com:3306/db_testdb?useOldAliasMetadataBehavior=true
    username: "test"
    password: "test"
    auth: Container
    maxActive: 10
    maxIdle: 1
    maxWait: 120000
    testWhileIdle: true
    timeBetweenEvictionRunsMillis: 10000
    minEvictableIdleTimeMillis: 60000
    removeAbandoned: true
    removeAbandonedTimeout: 300
    noAccessToProcedureBodies: true

请在下面找到简单的存储过程代码。

CREATE PROCEDURE `proc_test`(
    input VARCHAR (10)
)
BEGIN
    SELECT 
        `column1` AS `Ticker`, 
        DATE_FORMAT(`date`, '%Y-%m-%d') AS `date`,
        COUNT(*) AS `count` 
    FROM 
        `db_testdb`.`table1`
    WHERE
        `column1` = input
    GROUP BY 
        `column1`;
END$$

DELIMITER ;