gzip failing to unzip

To find a low frequency failure in a production system I have
been taking periodic dumps (using phymyadmin-export) specifying
that the file be gzipped. It appears to have worked just fine.

Today I went to unzip one of the files to use it as a mysql
source on the development system so I could dig into the problem

gunzip reported:
gzip: IS-2016-12-31.sql.gz: decompression OK, trailing garbage

The "trailing garbage" is the last 3/4 of the file. The gzipped
file is 17MB.

Anybody have any ideas what is going wrong and or suggestions
that I can try to recover the data.



Re: gzip failing to unzip

By silver.bullet at 03/22/2017 - 14:31

On Wed, 22 Mar 2017 14:06:33 -0400, william drescher wrote:
No, I don't have an explanation or idea, but Google found this:
<a href="" title=""></a>

I don't know if this works, I even don't know perl. If you also
shouldn't understand it, simply test it in a container using a copy.


Re: gzip failing to unzip

By bill at 03/24/2017 - 07:55

On 3/22/2017 2:31 PM, Ralf Mardorf wrote:

Re: gzip failing to unzip

By Xen at 03/22/2017 - 14:30

william drescher schreef op 22-03-2017 19:06:
I have only sometimes 'got' that when the downloaded file (over http)
was bigger than the actual file, ie. it was some download error through
erroneous size reporting of the server, I believe.

But you seem to suggest that the file is actually _meant_ to be 17MB
big, right? Well not actually. Oh yeah, I'm mistaken. If 75% of the time
is garbage that is a tad much :p. But it sounds to me that the file
ended correctly, there was just more data that was not actually data.
Are you completely sure the resulting file is corrupted?


Re: gzip failing to unzip

By bill at 03/24/2017 - 07:56

On 3/22/2017 2:30 PM, Xen wrote: