小编f_p*_*ras的帖子

我们如何使用API​​从IDE在Kafka中创建主题,因为当我这样做时:

bin/kafka-create-topic.sh --topic mytopic --replica 3 --zookeeper localhost:2181

我收到错误:

bash: bin/kafka-create-topic.sh: No such file or directory

我按照原样关注了开发人员设置.

有人可以给我一个例子,说明如何使用Apache PDFBox在不同的图像中转换pdf(pdf的每一页一个).提前致谢

在我的Windows 7中安装我的蚂蚁后.在cmd中我键入了ant -v,它给出了ant版本,但它也说明了以下内容.

Buildfile: build.xml does not exist!
Build failed

系统中有什么问题.我该如何纠正这个问题？

我需要将Tomcat内存设置配置为较大安装的一部分,因此在事实无法实现之后,使用配置应用程序手动配置tomcat.我以为我可以把JVM内存设置放到JAVA_OPTS环境变量中,但是我正在用jconsole测试它是否有效,而且它没有.

根据下面的评论,CATALINA_OPTS也不起作用.到目前为止,我能让它工作的唯一方法是通过Tomcat配置GUI,这对我的问题来说不是一个可接受的解决方案.

我在Java中使用PdfBox从PDF文件中提取文本.提供的某些输入文件无效,PDFTextStripper会暂停这些文件.是否有一种干净的方法来检查提供的文件是否确实是有效的PDF？

I am fairly new to Tomcat. I just managed to build a project and exported it as a WAR file. I tried manually copying a WAR file to the Tomcat folder then restarting. It created the folder structure and everything but I get a 404 Status code when I try to reach the application. I tried deploying it through the Tomcat Admin panel but I'm seeing the same behavior. Am I doing anything fundamentally wrong?

我正在与Apache Spark和PostgreSQL建立JDBC连接,我想在我的数据库中插入一些数据.当我使用append模式时,我需要id为每个模式指定DataFrame.Row.Spark有什么方法可以创建主键吗？

我对solr不太熟悉.我成功安装了solr.它使用的是码头网络服务器.我的solr版本是4.10.3.管理员页面不受密码保护.任何人都可以访问它.我想在solr admin上应用paaword.我该怎么办？

我正在使用Apache的HttpClient组件来完成以下简单程序,我看到以下异常:

Exception in thread "main" java.lang.NoSuchFieldError: INSTANCE
    at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.(DefaultHttpRequestWriterFactory.java:52)
    at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.(DefaultHttpRequestWriterFactory.java:56)
    at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.(DefaultHttpRequestWriterFactory.java:46)
    at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.(ManagedHttpClientConnectionFactory.java:72)
    at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.(ManagedHttpClientConnectionFactory.java:84)
    at org.apache.http.impl.conn.ManagedHttpClientConnectionFactory.(ManagedHttpClientConnectionFactory.java:59)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager$InternalConnectionFactory.(PoolingHttpClientConnectionManager.java:487)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:147)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:136)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.(PoolingHttpClientConnectionManager.java:112)
    at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:726)
    at com.starwood.rms.controller.property.HttpExample.main(HttpExample.java:14)

public class HttpExample {

    public static void main(String[] args) {
        HttpClient client = HttpClientBuilder.create().build();
        HttpGet request = new HttpGet("https://www.google.com/?q=java");

        try {
            HttpResponse response = client.execute(request);
            System.out.println(response.getStatusLine());

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

我在用

• HttpClient的-4.3.3.jar
• 的HttpCore-4.3.2.jar

有任何想法吗？

我正在使用Hadoop 2.0.5运行Apache Pig .11.1.

我在Pig中运行的大多数简单工作都非常好.

但是,每当我尝试在大型数据集或LIMIT运算符上使用GROUP BY时,我都会收到以下连接错误:

2013-07-29 13:24:08,591 [main] INFO  org.apache.hadoop.mapred.ClientServiceDelegate - Application state is completed. FinalApplicationStatus=SUCCEEDED. Redirecting to job history server 
013-07-29 11:57:29,421 [main] INFO  org.apache.hadoop.ipc.Client - Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)

2013-07-29 11:57:30,421 [main] INFO  org.apache.hadoop.ipc.Client - Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)

2013-07-29 11:57:31,422 [main] INFO  org.apache.hadoop.ipc.Client - Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 2 time(s); …