uploadify上传问题

以前使用uploadify上传文件都没有错误，最近做一个程序，使用uploadify上传log日志文件，大部分都能上传成功，包括formData的参数都能成功，但是有极个别的log文件上传的时候上传不成功。
在服务器端打印 $_POST 和 $_FILES，都为空。
日志文件名称都是统一格式的，日志也都是 utf-8编码，但是有些可以成功，有些不能成功，有哪位大神碰到过，请指点一下，谢谢！

回复讨论(解决方案)

以下是uploadify的debug信息

---SWFUpload Instance Info---Version: 2.2.0 2009-03-25Movie Name: SWFUpload_0Settings:	upload_url:               /index.php/data/datainsql/upfile	flash_url:                /public/swf/uploadify.swf?preventswfcaching=1407894488103	use_query_string:         false	requeue_on_error:         true	http_success:             	assume_success_timeout:   30	file_post_name:           Filedata	post_params:              [object Object]	file_types:               *.log	file_types_description:   请选择日志文件	file_size_limit:          0	file_upload_limit:        0	file_queue_limit:         999	debug:                    true	prevent_swf_caching:      true	button_placeholder_id:    file_upload	button_placeholder:       Not Set	button_image_url:         /index.php/data/datainsql/	button_width:             120	button_height:            30	button_text:              	button_text_style:        color: #000000; font-size: 16pt;	button_text_top_padding:  0	button_text_left_padding: 0	button_action:            -110	button_disabled:          false	custom_settings:          [object Object]Event Handlers:	swfupload_loaded_handler assigned:  false	file_dialog_start_handler assigned: true	file_queued_handler assigned:       true	file_queue_error_handler assigned:  true	upload_start_handler assigned:      true	upload_progress_handler assigned:   true	upload_error_handler assigned:      true	upload_success_handler assigned:    true	upload_complete_handler assigned:   true	debug_handler assigned:             trueSWF DEBUG: SWFUpload Init CompleteSWF DEBUG: SWF DEBUG: ----- SWF DEBUG OUTPUT ----SWF DEBUG: Build Number:           SWFUPLOAD 2.2.0SWF DEBUG: movieName:              SWFUpload_0SWF DEBUG: Upload URL:             /index.php/data/datainsql/upfileSWF DEBUG: File Types String:      *.logSWF DEBUG: Parsed File Types:      logSWF DEBUG: HTTP Success:           0SWF DEBUG: File Types Description: 请选择日志文件 (*.log)SWF DEBUG: File Size Limit:        0 bytesSWF DEBUG: File Upload Limit:      0SWF DEBUG: File Queue Limit:       999SWF DEBUG: Post Params:SWF DEBUG:                         type=rizhiSWF DEBUG: ----- END SWF DEBUG OUTPUT ----SWF DEBUG: Removing Flash functions hooks (this should only run in IE and should prevent memory leaks)SWF DEBUG: Event: fileDialogStart : Browsing files. Multi Select. Allowed file types: *.logSWF DEBUG: Select Handler: Received the files selected from the dialog. Processing the file list...SWF DEBUG: Event: fileQueued : File ID: SWFUpload_0_0SWF DEBUG: Event: fileDialogComplete : Finished processing selected files. Files selected: 1. Files Queued: 1SWF DEBUG: StartUpload: First file in queueSWF DEBUG: Event: uploadStart : File ID: SWFUpload_0_0SWF DEBUG: Global Post Item: type=rizhiSWF DEBUG: ReturnUploadStart(): File accepted by startUpload event and readied for upload.  Starting upload to /index.php/data/datainsql/upfile for File ID: SWFUpload_0_0SWF DEBUG: Event: uploadProgress (OPEN): File ID: SWFUpload_0_0SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 589824. Total: 8666287SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 4063232. Total: 8666287SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 7340032. Total: 8666287SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 8666287. Total: 8666287SWF DEBUG: Event: uploadSuccess: File ID: SWFUpload_0_0 Response Received: true Data: {"file":"E:\/web\/kh\/workdata\/\/","type":null,"flag":"error"}SWF DEBUG: Event: uploadComplete : Upload cycle complete.

在服务器端打印 $_POST 和 $_FILES，都为空
是空白，还是空数组？
如果是空数组，则表示上传没有实际进行进行
如果是空白，则表示上传的文件大小超过了 post_max_size 的限定

在服务器端打印 $_POST 和 $_FILES，都为空
是空白，还是空数组？
如果是空数组，则表示上传没有实际进行进行
如果是空白，则表示上传的文件大小超过了 post_max_size 的限定

还需要分别检查各个转发机的max_post_size 踩过这个坑

果然是超大小了，只设置的上传文件大小，没设置POST大小，