小编Ace*_*Ace的帖子

我定期得到错误:

错误JDBCExceptionReporter - > javax.resource.ResourceException:IJ000453:无法获取java的托管连接:jboss/datasources/myDB 08:12:05,928 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[ default-host].[/ mySoftware].[jsp]](ajp - xx.255.0.yyy-8109-21)Servlet jsp的Servlet.service()抛出异常:javax.resource.ResourceException:IJ000655:没有托管连接在org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:377)等配置的阻塞超时(30000 [ms])内可用.

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所以,我有下一个数据源配置.在JBoss AS上:

<datasource jta="true" jndi-name="java:jboss/datasources/myDB" pool-name="ssbs-pssbs" enabled="true" use-ccm="true">
                    <connection-url>jdbc:postgresql://xx.255.0.yyy/myDatabase</connection-url>
                    <driver-class>org.postgresql.Driver</driver-class>
                    <driver>postgresql-jdbc4</driver>
                    <pool>
                        <min-pool-size>30</min-pool-size>
                        <max-pool-size>150</max-pool-size>
                        <prefill>true</prefill>
                        <use-strict-min>false</use-strict-min>
                        <flush-strategy>FailingConnectionOnly</flush-strategy>
                    </pool>
                    <security>
                        <user-name>tick</user-name>
                        <password>tack</password>
                    </security>
                    <validation>
                        <check-valid-connection-sql>SELECT 1</check-valid-connection-sql>
                        <validate-on-match>false</validate-on-match>
                        <background-validation>false</background-validation>
                    </validation>
                    <timeout>
                        <blocking-timeout-millis>30000</blocking-timeout-millis>
                        <idle-timeout-minutes>5</idle-timeout-minutes>
                    </timeout>
                    <statement>
                        <share-prepared-statements>false</share-prepared-statements>
                    </statement>
                </datasource>

在我的Postgres服务器上我允许500上的max_connection.为什么我得到这个例外？

我有一个rpt文件,使用它我将生成pdf格式的多个报告.使用inet清除报告中的Engine类.这个过程需要很长时间,因为我要生成近10000个报告.我可以使用Mutli线程或其他方法来加快进程吗？

任何有关如何完成它的帮助都会有所帮助

我的部分代码.

 //Loops
 Engine eng = new Engine(Engine.EXPORT_PDF);
 eng.setReportFile(rpt); //rpt is the report name
 if (cn.isClosed() || cn == null ) {
    cn = ds.getConnection();
 }
 eng.setConnection(cn);
 System.out.println(" After set connection");
 eng.setPrompt(data[i], 0);
 ReportProperties repprop = eng.getReportProperties();
 repprop.setPaperOrient(ReportProperties.DEFAULT_PAPER_ORIENTATION, ReportProperties.PAPER_FANFOLD_US);
 eng.execute();
 System.out.println(" After excecute");
 try {
      PDFExportThread pdfExporter = new PDFExportThread(eng, sFileName, sFilePath);
      pdfExporter.execute();
 } catch (Exception e) {
      e.printStackTrace();
 }

PDFExportThread执行

 public void execute() throws IOException {
      FileOutputStream fos = null;
      try {
           String FileName = sFileName + "_" …