This means the file isn't really a gzipped tar file -- or any kind of gzipped file -- in spite of being named like one.
When you download a file with wget, check for indications like Length: unspecified [text/html] which shows it is plain text (text) and that it is intended to be interpreted as html. Check the wget output below -
[root@XXXXX opt]# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz"
--2017-10-12 12:39:40-- http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz
Resolving download.oracle.com (download.oracle.com)... 23.72.136.27, 23.72.136.67
Connecting to download.oracle.com (download.oracle.com)|23.72.136.27|:80... connected.
HTTP request sent, awaiting response... 302 Not Allowed
Location: http://XXXX/FAQs/URLFiltering/ProxyWarning.html [following]
--2017-10-12 12:39:40-- http://XXXX/FAQs/URLFiltering/ProxyWarning.html
Resolving XXXX (XXXXX)... XXX.XX.XX.XXX
Connecting to XXXX (XXXX)|XXX.XX.XX.XXX|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 17121 (17K) [text/html]
Saving to: ‘jdk-8u144-linux-x64.tar.gz’
100%[=========================================================================================================================================================================>] 17,121 --.-K/s in 0.05s
2017-10-12 12:39:40 (349 KB/s) - ‘jdk-8u144-linux-x64.tar.gz’ saved [17121/17121]
This sort of confirms that you haven't received a gzip file.
For a correct file, the wget output will show something like Length: 185515842 (177M) [application/x-gzip] as shown in the below output -
[root@txcdtl01ss270n opt]# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz"
--2017-10-12 12:50:06-- http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz
Resolving download.oracle.com (download.oracle.com)... XX.XXX.XX.XX, XX.XX.XXX.XX
Connecting to download.oracle.com (download.oracle.com)|XX.XX.XXX.XX|:80... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://edelivery.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz [following]
--2017-10-12 12:50:06-- https://edelivery.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz
Resolving edelivery.oracle.com (edelivery.oracle.com)... XXX.XX.XXX.XX, 2600:1404:16:188::2d3e, 2600:1404:16:180::2d3e
Connecting to edelivery.oracle.com (edelivery.oracle.com)|XXX.XX.XX.XXX|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz?AuthParam=1507827127_f44251ebbb44c6e61e7f202677f94afd [following]
--2017-10-12 12:50:07-- http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz?AuthParam=1507827127_f44251ebbb44c6e61
Connecting to download.oracle.com (download.oracle.com)|XX.XX.XXX.XX|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 185515842 (177M) [application/x-gzip]
Saving to: ‘jdk-8u144-linux-x64.tar.gz’
100%[=========================================================================================================================================================================>] 185,515,842 6.60MB/s in 28s
2017-10-12 12:50:34 (6.43 MB/s) - ‘jdk-8u144-linux-x64.tar.gz’ saved [185515842/185515842]
The above shows a correct gzip application file has been downloaded.
You can also file, head, less, view utilities to check the file. For example a HTML file would give below output -
[root@XXXXXX opt]# head jdk-8u144-linux-x64.tar.gz
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="/css/print.css" rel="stylesheet" media="print">
<link href="/css/main.css" rel="stylesheet" media="screen">
<link href="/css/font-awesome.min.css" rel="stylesheet">
The above shows it is indeed an HTML page which we are trying to unzip/untar - something that won't work. If it was indeed a correct zip file (binary in nature) the output of head would have produced garbage - something like below -
[root@XXXX opt]# head jdk-8u144-linux-x64.tar.gz
x?rY?[ms?F???????t?l???DR??????j
$?$,`0?h?_????/??=?@Q?w+???*?Hbfz?{?~?{?i?x??k?????}????z???w????g?????{???;{s????w?????7?N????i?
?????}
?¿g????????????7??s??????î??????~i??j?/??????#???=??=>???{}??|?????????????3???X???]9??????u?????%g?<^)?H?8?F?R?t?o?L?u??S%?ds5?2_EZn?t^??
?N3??(??<??|'?q???R?N?gq?Uv!???p???rL??M??u??.?Q?5?T??BNw?!$??<>?7G'$?,Mt4WY?Gi"?=??p?)?VIN3????\ek??0??G
?<L?c?e?t-???2???G:?ia??I?<?g3???d?H????[2`?<I?A?6?W??<??C???????h??A0QL?2?4?-*
?x?????t%t1??f?>+A??,Lr?
?Fe:MBH????
C?Q?r?S??<M?b?<,5???@???s???c??sp?f?=g?????k???4?}??kh)?¹Z??#d?*{???-?.N?)?e??s:?H(VQ??3*?$2??r?v?"o?_??!A???????B?l=A?|??@??0??1??5??4g?
?
???Se????H[2?????t??5?Df????$1???b$? h?Op????!Lvb!p??b?8^?Y???n?
O??????|??lW?lu??*?N?M???
?/?^0~?~?#??q????????K??;?d???aw4?????'?~?7??ky?o?????????t?'k??f????!vo???'o??? ?.?Pn\?
?+??K"FA{????n2????v??!/Ok??r4?c5?x$'?.?&w?!?%??o??????2???i
?a0??Ag?d????GH)G7~?g???b??%?b??rt?m~? ?????t0?? <????????????5?q?t??K(??+Z<??=???:1?\?x?p=t?`??G@F?? i?????p8?????H.???dMLE??e[?`?'n??*h[??;?0w'??6A??M?x?fpeB>&???MO???????`?@á/?"?????(??^???n??=????5??@?Mx??d:\YAn???]|?w>??S??FA9?J?k!?@?
Try downloading from the official site and check if their download links have changed. Also check your proxy settings and make sure you have the right proxies enabled to download/wget it from the correct source.
Hope this helps.