小编Rob*_*t H的帖子

我在Amazon RDS实例上运行Oracle 11GR2.我偶尔IO Error: Got minus one from a read call打电话给DriverManager.getConnection(getUrl())我,我不知道为什么.其他应用程序正常工作

为了进一步混淆事物,错误会偶尔纠正(在程序的下一次迭代之后).

我应该如何处理"从读取调用中减去一个"错误？

完整堆栈跟踪:

java.sql.SQLRecoverableException: IO Error: Got minus one from a read call
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:489)
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:553)
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:254)
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
    at java.sql.DriverManager.getConnection(DriverManager.java:579)
    at java.sql.DriverManager.getConnection(DriverManager.java:243)
    at com.cwd.facile.db.Database.<init>(Database.java:44)
    at com.cwd.facile.ns.NetSuiteRequestBased.<init>(NetSuiteRequestBased.java:29)
    at com.cwd.facile.ns.CommonOperations.isInventoryItem(CommonOperations.java:205)
    at com.cwd.facile.ns.CommonOperations.findItemIdByName(CommonOperations.java:188)
    at com.cwd.facile.ns.CommonOperations.createSalesOrder(CommonOperations.java:970)
    at com.cwd.facile.Main.main(Main.java:47)
Caused by: oracle.net.ns.NetException: Got minus one from a read call
    at oracle.net.ns.Packet.receive(Packet.java:311)
    at oracle.net.ns.NSProtocol.connect(NSProtocol.java:300)
    at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1140)
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:340)
    ... 12 more

Database.java第44行: setConn(DriverManager.getConnection(getUrl()));

其他信息:

• 我认为这是一个糟糕的JDBC网址,但它确实有效,有时连续几天才会失败.
• Amazon …

如何在Java中正确地从C#中提供以下功能？

[C#]

#define PRODUCTION //Change from sandbox to production to switch between both systems.

#if SANDBOX
    using NetSuite.com.netsuite.sandbox.webservices;
#endif

#if PRODUCTION
    using NetSuite.com.netsuite.webservices;
#endif

我正在给JetBrains IntelliJ IDEA 12.0.4一个旋转,并在编译程序时遇到问题.当我运行程序时,我收到以下错误:

   Internal error: (java.io.FileNotFoundException) \domain.local\usersfolders\roberth\.IntelliJIdea12\system\compile-server\hibernate_test_1ad22f80\timestamps\data (The system cannot find the path specified)
java.io.FileNotFoundException: \domain.local\usersfolders\roberth\.IntelliJIdea12\system\compile-server\hibernate_test_1ad22f80\timestamps\data (The system cannot find the path specified)
    at java.io.RandomAccessFile.open(Native Method)
    at java.io.RandomAccessFile.<init>(RandomAccessFile.java:233)
    at com.intellij.util.io.PagedFileStorage.resizeFile(PagedFileStorage.java:324)
    at com.intellij.util.io.PagedFileStorage.resize(PagedFileStorage.java:308)
    at com.intellij.util.io.ResizeableMappedFile.resize(ResizeableMappedFile.java:72)
    at com.intellij.util.io.ResizeableMappedFile.<init>(ResizeableMappedFile.java:46)
    at com.intellij.util.io.PersistentBTreeEnumerator.<init>(PersistentBTreeEnumerator.java:76)
    at com.intellij.util.io.PersistentEnumeratorDelegate.<init>(PersistentEnumeratorDelegate.java:38)
    at com.intellij.util.io.PersistentEnumeratorDelegate.<init>(PersistentEnumeratorDelegate.java:31)
    at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:137)
    at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:133)
    at org.jetbrains.jps.incremental.storage.AbstractStateStorage.createMap(AbstractStateStorage.java:122)
    at org.jetbrains.jps.incremental.storage.AbstractStateStorage.<init>(AbstractStateStorage.java:27)
    at org.jetbrains.jps.incremental.storage.TimestampStorage.<init>(TimestampStorage.java:21)
    at org.jetbrains.jps.incremental.storage.ProjectTimestamps.<init>(ProjectTimestamps.java:21)
    at org.jetbrains.jps.cmdline.BuildRunner.load(BuildRunner.java:90)
    at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:181)
    at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:102)
    at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler$1.run(BuildMain.java:107)
    at org.jetbrains.jps.service.impl.SharedThreadPoolImpl$1.run(SharedThreadPoolImpl.java:26)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)

这发生在Run和 …

我是第一次在NetBeans中查看分析器,今天早上我注意到我通过Monitor分析器显示了超过1700个幸存的代,但是堆大小不变.在做一些阅读时,我发现这篇文章讨论了如何使用NetBeans探查器来发现泄漏.

因此,在关注文章建议后,我开始了一个内存分析器.在查看结果时,我发现char []占了大多数幸存的世代.目前,在这篇文章中,char []已经22代了.

现在一些帖子(OldCurmudgeon在底部附近评论)表明,如果我的堆稳定,没有泄漏,而其他人说,如果世代继续增长,那么.所以我有点困惑,哪个是对的.

所以,我的问题是:

根据以下屏幕截图,我应该进一步研究潜在的内存泄漏吗？

内存(堆)

存储器(GC)

实时分配的对象

我有以下logback.xml配置:

<configuration>
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- encoders are assigned the type
         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
    <encoder>
      <pattern>%-4relative [%thread] %-5level %logger{35} - %msg %n</pattern>
    </encoder>
  </appender>

    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>logFile.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <!-- daily rollover -->
      <fileNamePattern>logFile.%d{yyyy-MM-dd}.log</fileNamePattern>

      <!-- keep 30 days' worth of history -->
      <maxHistory>30</maxHistory>
    </rollingPolicy>

    <encoder>
      <pattern>%-4relative [%thread] %highlight(%-5level) %cyan(%logger{35}) - %msg%n</pattern>
    </encoder>
  </appender> 

  <root level="DEBUG">
    <appender-ref ref="STDOUT" />
    <appender-ref ref="FILE" /> 

  </root>
</configuration>

如果我在eclipse(juno)中编辑配置文件,我会收到以下错误:

11:02:54,114 INFO  [main] Main  - javax.xml.transform.TransformerFactory=null
11:02:54,115 INFO  [main] Main  - java.endorsed.dirs=C:\Program Files\Java\jre7\lib\endorsed
11:02:54,117 …

我尝试使用IntelliJ 12.1.4和Java 7创建一个使用Maven 3.0.5的jar时出错.我能够通过IDE运行项目没有问题,但是当我尝试打包它时,我得到以下错误.

(摘自我的POM的相关部分Maven By Example通过Sonatype)是:

<build>
    <plugins>
        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <configuration>
                <descriptorRefs>jar-with-dependencies</descriptorRefs>
            </configuration>
        </plugin>
    </plugins>
</build>

而错误是:

[ERROR] ...[33,55] error: diamond operator is not supported in -source 1.5
[ERROR] ...[207,7] error: try-with-resources is not supported in -source 1.5
[ERROR] ...[73,52] error: diamond operator is not supported in -source 1.5
[ERROR] ...[129,40] error: multi-catch statement is not supported in -source 1.5
[ERROR] ...[44,6] error: try-with-resources is not supported in -source 1.5
[ERROR] ...[28,39] error: diamond operator …

我有一个表,我需要处理各种角色.字符包括Ø,®等.

我已将我的表设置为utf-8作为默认排序规则,所有列都使用表默认值,但是当我尝试插入这些字符时,我收到错误:字符串值不正确:'\ xEF\xBF\xBD'列为'buyerName'at at第1行

我的连接字符串定义为

string mySqlConn = "server="+server+";user="+username+";database="+database+";port="+port+";password="+password+";charset=utf8;";

我不知道为什么我仍然看到错误.我是否错过了.net连接器或我的MySQL设置？

- 编辑 -

我的(新)C#插入语句如下所示:

MySqlCommand insert = new MySqlCommand( "INSERT INTO fulfilled_Shipments_Data " +
     "(amazonOrderId,merchantOrderId,shipmentId,shipmentItemId,"+
     "amazonOrderItemId,merchantOrderItemId,purchaseDate,"+ ...

      VALUES (@amazonOrderId,@merchantOrderId,@shipmentId,@shipmentItemId,"+
      "@amazonOrderItemId,@merchantOrderItemId,@purchaseDate,"+ 
      "paymentsDate,shipmentDate,reportingDate,buyerEmail,buyerName,"+ ...


       insert.Parameters.AddWithValue("@amazonorderId",lines[0]);
       insert.Parameters.AddWithValue("@merchantOrderId",lines[1]); 
       insert.Parameters.AddWithValue("@shipmentId",lines[2]);
       insert.Parameters.AddWithValue("@shipmentItemId",lines[3]);
       insert.Parameters.AddWithValue("@amazonOrderItemId",lines[4]);
       insert.Parameters.AddWithValue("@merchantOrderItemId",lines[5]);
       insert.Parameters.AddWithValue("@purchaseDate",lines[6]);
       insert.Parameters.AddWithValue("@paymentsDate",lines[7]);

 insert.ExecuteNonQuery();

假设这是使用参数化语句的正确方法,它仍然会给出错误

 "Incorrect string value: '\xEF\xBF\xBD' for column 'buyerName' at row 1"

还有其他想法吗？

我正在重新设计一个数据库,该数据库当前将格式为ISO 8601的日期2012-10-27T07:30:38+00:00导入到varchar字段中.当前数据库托管在MySQL 5.5服务器上.

在搜索文档和各种SO帖子时,我还没有找到关于我应该在MySQL中使用什么数据类型的明确答案.最接近的帖子是: MySQL插入到DATETIME:使用ISO :: 8601格式是否安全？它提供各种各样的工作,但这不是一个理想的选择.

MySQL文档(http://dev.mysql.com/doc/refman/5.5/en/date-and-time-types.html)没有说明,我在官方文档中找到的唯一参考位于页面上:http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html

其中指出"第一个和第二个参数的可能值导致几个可能的格式字符串(对于使用的说明符,请参阅DATE_FORMAT()函数说明中的表格.)ISO格式是指ISO 9075,而不是ISO 8601."

现在,PostgreSQL文档专门提到了ISO8601(http://www.postgresql.org/docs/9.2/static/datetime-keywords.html和http://www.postgresql.org/docs/9.2/static/datatype-datetime. html)这引出了我的问题:

MySQL是否正确支持ISO 8601,还是应该考虑使用本机支持的数据库？

- 编辑 -

尝试将上面的示例时间戳插入到datetime列中会出现以下错误:

10:55:55    insert into test(date1) values('2012-10-27T07:30:38+00:00') Error Code: 1292. Incorrect datetime value: '2012-10-27T07:30:38+00:00' for column 'date1' at row 1 0.047 sec

我是第一次使用log4net,并使用提供的配置示例跟踪文档,但是调试语句不记录.

信息,错误,警告和致命级别都正确记录.谁能告诉我我失踪了什么？

的app.config:

<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />

<log4net>
    <appender name="Console" type="log4net.Appender.ColoredConsoleAppender">

        <mapping>
            <level value="INFO" />
            <foreColor value="Green"/>
        </mapping>

        <mapping>
            <level value="DEBUG" />
            <foreColor value="Cyan,HighIntensity"/>
        </mapping>

        <mapping>
            <level value="WARN" />
            <foreColor value="Purple,HighIntensity"/>
        </mapping>

        <mapping>
            <level value="ERROR" />
            <foreColor value="Red,HighIntensity"/>
        </mapping>

        <mapping>
            <level value="FATAL" />
            <foreColor value="Yellow,HighIntensity"/>
        </mapping>

        <layout type="log4net.Layout.PatternLayout">
            <!-- Pattern to output the caller's file name and line number -->
            <conversionPattern value="%5level [%thread] (%file:%line) - %message%newline" />
        </layout>            
    </appender>

    <appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
        <file value="example.log" />
        <appendToFile value="true" />
        <maximumFileSize …

我有以下XML响应,我试图使用XmlSerializer反序列化.当我删除对XML序列化程序的调用时,我没有抛出任何错误.每次我使用XmlSerializer时都会出现异常.我错过了什么？

例外情况是:

System.Xml.XmlException: Root element is missing.
  at System.Xml.XmlTextReaderImpl.Throw(Exception e)
  at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
  at System.Xml.XmlTextReaderImpl.Read()
  at System.Xml.XmlTextReader.Read()
  at System.Xml.XmlReader.MoveToContent()
  at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderSubmitReportResponse.Read5_NeweggAPIResponse()

Xml Doc是:

<?xml version="1.0" encoding="utf-8"?>
<NeweggAPIResponse>
    <IsSuccess>true</IsSuccess>
    <OperationType>OrderListReportResponse</OperationType>
    <SellerID>myID</SellerID>
    <ResponseBody>
        <ResponseList>
            <ResponseInfo>
                <RequestId>XXXXXXXX</RequestId>
                <RequestType>ORDER_LIST_REPORT</RequestType>
                <RequestDate>07/26/2012 09:27:06</RequestDate>
                <RequestStatus>SUBMITTED</RequestStatus>
            </ResponseInfo>
        </ResponseList>
    </ResponseBody>
</NeweggAPIResponse>

我对XmlSerializer的调用是:

XmlSerializer serializer = new XmlSerializer(typeof(SubmitReportResponse));
reportReq = serializer.Deserialize(respStream) as SubmitReportResponse;

SubmitReportResponse类是:

    public enum RequestStatus
{
    ALL,
    SUBMITTED,
    IN_PROGRESS,
    FINISHED,
    CANCELLED
}

/// <summary>
/// TODO: Update summary.
/// </summary>
[XmlRoot("NeweggAPIResponse")]
public class SubmitReportResponse
{
    public string IsSuccess { …