通过HTTP读取Zip文件 - java.io.EOFException：ZLIB输入流的意外结束

Question

我的Java服务器通过HTTP URL从Apache服务器读取Zip文件。该过程非常缓慢，读取整个文件大约需要6个小时。接近文件的末尾，它会抛出下面的异常。如果更快地读取文件，则不会发生异常。服务器之间没有防火墙。我该如何解决这个问题？

例外：

java.io.EOFException: Unexpected end of ZLIB input stream
    at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:240)
    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
    at java.util.zip.ZipInputStream.read(ZipInputStream.java:163)
    at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:282)
    at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:324)
    at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:176)
    at java.io.InputStreamReader.read(InputStreamReader.java:184)
    at java.io.BufferedReader.fill(BufferedReader.java:153)
    at java.io.BufferedReader.readLine(BufferedReader.java:316)
    at java.io.BufferedReader.readLine(BufferedReader.java:379)

JVM信息：

Java version: 1.6.0_34,Sun Microsystems Inc.
Java Runtime: OpenJDK Runtime Environment (build 1.6.0_34-b34)
Java VM: OpenJDK 64-Bit Server VM 23.25-b01,Sun Microsystems Inc.
OS-System: Linux 2.6.32-504.8.1.el6.x86_64,amd64

重现错误的Java代码：

public void process(long sleepMillis, String fileUrl) throws Exception {
    BufferedReader buffReader = null;
    ZipInputStream is = null;
    try {
        URL inputFileURL = new URL(fileUrl);
        URLConnection con = inputFileURL.openConnection();
        is = new ZipInputStream(con.getInputStream());
        InputStreamReader reader = new InputStreamReader(is);
        buffReader = new BufferedReader(reader);
        ZipEntry ze;
        while ((ze = is.getNextEntry()) != null) {
            log("*** ZipEntry name:" + ze.getName() + ", size: "
                    + ze.getSize());
            int records = 0;
            String buffer;
            while ((buffer = buffReader.readLine()) != null) {
                records++;
                log("rec[" + records + "]" + buffer);
                Thread.sleep(sleepMillis);
            }
            log("total recs: " + records);
        }
    } finally {
        if (buffReader != null) {
            buffReader.close();
        }
        if (is != null) {
            is.close();
        }
    }
    log("DONE");
}