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Java NullPointException - 初始化管理器时出错

tag-icon • tag-icon windows-7 java 32-bit
Java NullPointException - 初始化管理器时出错

这里有一个大问题，需要您的帮助。Java 似乎在我们工作的许多笔记本电脑上都出现了问题。

错误日志：

cache: Initialize resource manager: com.sun.deploy.cache.ResourceProviderImpl@13c765e
network: Created version ID: 1.7.0.40
network: Created version ID: 1.7
network: Created version ID: 2.2.40
network: Cache entry found [url: http://java.com/en/download/JavaDetection_applet.jnlp, version: null] prevalidated=false/0
cache: Adding MemoryCache entry: http://java.com/en/download/JavaDetection_applet.jnlp
temp: new XMLParser with source:
temp: <?xml version="1.0" encoding="UTF-8"?>
<jnlp codebase="https://java.com/en/download/" href="JavaDetection_applet.jnlp" spec="1.0+">
    <information>
        <title>Java Detection</title>
        <vendor>Oracle Inc.</vendor>
    </information>
    <resources>
        <!-- Application Resources -->
  <j2se version="1.6+"/>
        <jar href="JavaDetection.jar" />
    </resources>
 <security>
  <all-permissions /> 
 </security>
    <applet-desc 
         name="Java Detection Applet"
         main-class="JavaDetection"
         width="1"
         height="1">
     </applet-desc>
     <update check="background"/>
</jnlp>
temp: 
returning ROOT as follows:
<jnlp codebase="https://java.com/en/download/" href="JavaDetection_applet.jnlp" spec="1.0+">
  <information>
    <title>Java Detection</title>
    <vendor>Oracle Inc.</vendor>
  </information>
  <resources>
    <j2se version="1.6+"/>
    <jar href="JavaDetection.jar"/>
  </resources>
  <security>
    <all-permissions/>
  </security>
  <applet-desc name="Java Detection Applet" main-class="JavaDetection" width="1" height="1"/>
  <update check="background"/>
</jnlp>
network: Created version ID: 1.6+
network: Created version ID: 1.9
temp: returning LaunchDesc from XMLFormat.parse():
<jnlp spec="1.0+" codebase="https://java.com/en/download/" href="https://java.com/en/download/JavaDetection_applet.jnlp">
  <information>
    <title>Java Detection</title>
    <vendor>Oracle Inc.</vendor>
    <homepage href="null"/>
  </information>
  <security>
    <all-permissions/>
  </security>
  <update check="background" policy="always"/>
  <resources>
    <java version="1.6+"/>
    <jar href="https://java.com/en/download/JavaDetection.jar" download="eager" main="false"/>
  </resources>
  <applet-desc name="Java Detection Applet" main-class="JavaDetection" documentbase="http://java.com/en/download/installed.jsp?detect=jre" width="1" height="1"/>
</jnlp>
network: Cache entry not found [url: https://java.com/en/download/JavaDetection_applet.jnlp, version: null]
network: Cache entry not found [url: https://java.com/en/download/JavaDetection_applet.jnlp, version: null]
network: Connecting https://java.com/en/download/JavaDetection_applet.jnlp with proxy=DIRECT
network: Cache entry not found [url: file:/C:/Program%20Files%20(x86)/Java/jre7/lib/ext/sunec.jar, version: null]
network: Cache entry not found [url: file:/C:/Program%20Files%20(x86)/Java/jre7/lib/ext/sunjce_provider.jar, version: null]
network: Connecting http://java.com:443/ with proxy=DIRECT
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
 at sun.security.ssl.InputRecord.handleUnknownRecord(Unknown Source)
 at sun.security.ssl.InputRecord.read(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
 at com.sun.deploy.net.HttpUtils.followRedirects(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doGetRequestEX(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
network: Connecting https://java.com/en/download/JavaDetection_applet.jnlp with proxy=DIRECT
network: Connecting http://java.com:443/ with proxy=DIRECT
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
 at sun.security.ssl.InputRecord.handleUnknownRecord(Unknown Source)
 at sun.security.ssl.InputRecord.read(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
 at com.sun.deploy.net.HttpUtils.followRedirects(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doGetRequest(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
com.sun.deploy.net.FailedDownloadException: Unable to load resource: https://java.com/en/download/JavaDetection_applet.jnlp
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
Caused by:
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
 at sun.security.ssl.InputRecord.handleUnknownRecord(Unknown Source)
 at sun.security.ssl.InputRecord.read(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
 at com.sun.deploy.net.HttpUtils.followRedirects(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doGetRequest(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
network: Cache entry not found [url: https://java.com/en/download/JavaDetection_applet.jnlp, version: null]
network: Connecting https://java.com/en/download/JavaDetection_applet.jnlp with proxy=DIRECT
network: Connecting http://java.com:443/ with proxy=DIRECT
network: Cache entry not found [url: https://java.com/en/download/JavaDetection_applet.jnlp, version: null]
network: Cache entry not found [url: https://java.com/en/download/JavaDetection_applet.jnlp, version: null]
network: Connecting https://java.com/en/download/JavaDetection_applet.jnlp with proxy=DIRECT
network: Connecting http://java.com:443/ with proxy=DIRECT
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
 at sun.security.ssl.InputRecord.handleUnknownRecord(Unknown Source)
 at sun.security.ssl.InputRecord.read(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
 at com.sun.deploy.net.HttpUtils.followRedirects(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doGetRequestEX(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
network: Connecting https://java.com/en/download/JavaDetection_applet.jnlp with proxy=DIRECT
network: Connecting http://java.com:443/ with proxy=DIRECT
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
 at sun.security.ssl.InputRecord.handleUnknownRecord(Unknown Source)
 at sun.security.ssl.InputRecord.read(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
 at com.sun.deploy.net.HttpUtils.followRedirects(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doGetRequest(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
com.sun.deploy.net.FailedDownloadException: Unable to load resource: https://java.com/en/download/JavaDetection_applet.jnlp
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
Caused by:
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
 at sun.security.ssl.InputRecord.handleUnknownRecord(Unknown Source)
 at sun.security.ssl.InputRecord.read(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
 at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
 at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
 at com.sun.deploy.net.HttpUtils.followRedirects(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doGetRequest(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
 at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.redirectLaunchDesc(Unknown Source)
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
network: Cache entry not found [url: https://java.com/en/download/JavaDetection_applet.jnlp, version: null]
network: Connecting https://java.com/en/download/JavaDetection_applet.jnlp with proxy=DIRECT
network: Connecting http://java.com:443/ with proxy=DIRECT
java.lang.NullPointerException
 at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
 at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
 at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
 at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
Error while initializing manager: java.lang.NullPointerException, bail out

（Pastebin 上的错误日志）

它运行正常，但有许多 Windows 更新待处理。重新启动后 Java 崩溃了。有人也遇到过这个问题吗？我尝试单独卸载 KB，在删除后KB2876331，Java 运行了一段时间。重新启动后，Java 又崩溃了。

我尝试过的事情：

  1. 从笔记本电脑中完全卸载 Java 并重新安装，包括离线包安装和直接从 Java 站点安装（未成功）
  2. 卸载 Java，仅重新安装 64 位。（未成功）
  3. 卸载 64 位然后重新安装 32 位（未成功）
  4. 完全卸载 Java，运行 Microsoft Fix it 实用程序并重新安装（未成功）
  5. 卸载 Java 并使用名为 JavaRa 的实用程序卸载剩余组件：http://en.kioskea.net/faq/1560-remove-previous-versions-of-java-with-javara（未成功）
  6. 运行安装程序以从同一实用程序 JavaRa 安装 Java。它安装了 Java 6，而且有趣的是，它最终成功运行了！
  7. 尝试将 Java 6 从 Java 控制台更新至 Java 7 Update 45，但再次失败（未成功）
  8. 卸载后还尝试删除 Java 的所有文件（文件夹/注册表搜索），以确保它尽可能干净。（未成功）
  9. 尝试使用 Revo Uninstaller 删除 Java，但没有效果。

答案1

这看起来更像是配置问题，而不是 Java 本身的问题，日志中写道：

网络：正在连接http://java.com:443/使用代理=DIRECT javax.net.ssl.SSLException：无法识别的 SSL 消息，纯文本连接？

这说明您正在使用 http 进行连接（虽然是在端口 443 上），但尝试打开 SSL 连接。尝试使用 https 而不是 http？尝试使用浏览器亲自连接到该网站，看看您实际获得什么连接。

答案2

在升级到 Java 7 Update 51（32 位）后，我在 64 位 Windows 8 上的 IE10 中遇到了看似相同的问题。在启用日志记录和跟踪的情况下，日志的最后 10 行与您的基本相同，只是在我的情况下 .jnlp 缓存条目已过期而不是丢失。正如 Tim B 发现的那样，它试图连接到http://java.com:443/使用代理=DIRECT。

解决方案是打开 IE 的代理 - 我们位于 MS 防火墙后面。以前这对小程序来说不是问题，因为 ISA Server 的 Microsoft 防火墙客户端已经处理了流量。

我已经使用 KB2876331 一个多月了，所以这可能没有关系，但前几天我确实收到了一堆其他 MS 更新。

答案3

升级到 Java 7u79 后，小程序对我来说停止工作。我需要两样东西：

  1. 机器重启
  2. 防火墙重新配置 - 新的应用程序（jre7\bin\jp2launcher.exe）需要网络连接

答案4

经过多次尝试，我通过完全删除 Java 版本 8 并安装 Java 7u80 解决了该问题。

希望这可以帮到你！

丹尼尔

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