java.lang.OutOfMemoryError: Java heap space while creating ZIP archives in Google App Engine

[Ibrahim Ali]

Creating ZIP archives in Google App Engine (Java) <br />
I am got this error in the gae cloud logs:  <br>

java.lang.OutOfMemoryError: Java heap space <br>
at java.util.Arrays.copyOf(Arrays.java:2271)
at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:113) 
at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93)
at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:140)
<br><br>

I face this problem when zipping many files on the production server, 
so what should I do to fix it ? is there something can help in GAE 
or can I save zip file containing one file on the storage then open 
and edit it ? ( to min memory usage) 

    ByteArrayOutputStream zipBaos = new ByteArrayOutputStream();
    ZipOutputStream zipOut = new ZipOutputStream(zipBaos);
    byte[] tmpBuf = new byte[1024];


while end of files{
   byte[] fileContents = getFileContent(); // it is OK
   zipOut.putNextEntry(new ZipEntry(fileNameStr));

   ByteArrayInputStream in = new ByteArrayInputStream(fileContents);
   int len;
   while ((len = in.read(tmpBuf)) > 0) {
        out.write(tmpBuf, 0, len);
    }

    zipOut.closeEntry();
}


zipOut.close();