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What is mdnsd and why is it killing my battery?

Teacher

What is mdnsd and why is it killing my battery?

I have an unrooted LG G3 with whatever Android version that AT&T currently supports. A few days ago I noticed that the battery life was getting worse (I'd get like 6 hours out of normal use, i.e. full day use). I also noticed that under tha battery usage details, mdsnsd is one of the top offenders (along with Screen, Android System, etc). I do not remember seeing this process before, so I'm wondering what it is and how to get rid of it. My Google searches pointed me to the posts that suggest that this process may be caused by a microSD card (I removed it, but it did not help), Firefox bugs (I don't have Firefox on my phone), Flight Aware (or something like this that I don't have installed). Basically, none of the suggestions I saw applied to my phone. I also installed a brand new OEM battery (I purchased one recently), but it is no better than the old one. Is there anything I can do?

 

P.S. I also notice a process with no name that thakes a few battery cycles. Not too many, but I'm wondering why it has no name. Could it be a virus?

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Message 1 of 25
Contributor

Re: What is mdnsd and why is it killing my battery?

Likewise! My wife and I both have a GS7 and since the update a few days ago both of our batteries last one third of the time they did before. Please fix this AT&T!
Message 2 of 25
Teacher

Re: What is mdnsd and why is it killing my battery?

Just did factory reset (full refresh, with no app/data transfer), and the process is still there (just as the unnamed process). I checked my friends' phones and they do not seem to have this listed in the battery usage screen. What's going on there? Is this an LG or AT&T issue? I suspect it's related to some of the bloatware apps, but can't figure which one. I'm currently running the OS with no additional apps installed (Facebook is the only add-on app).

Message 3 of 25
Mentor

Re: What is mdnsd and why is it killing my battery?

Same thing on my S5 started around the same time. I can watch the battery drain and have to charge the phone at least once a day now. Mdnsd is at 34% and has been running for 7 hours! I don't have Firefox or any of the other suspected apps. Frustrated.
Message 4 of 25
ACE - Professor
Solution
Accepted by Administrator (Administrator)
Accepted by Lingoes
‎02-06-2017 9:46 AM

Re: What is mdnsd and why is it killing my battery?

This is a DNS daemon, and may see heavy use from a really wide variety of apps.  

Anything that's constantly hitting URLs, such as a social media app(s), or other apps that update frequently, could see high use from this.

 

If it were me, I'd diagnose by first disabling most of my background apps, except core (phone, built-in texting app, maybe email), and see if this fixes it.

If so, start by adding back in background apps, but give each 1-2 a day or so to run, before adding more.

One way to do a "quick check" here is to enable data-saver, and see if this also brings down the usage (this should, in thoery, prevent almost all non-essential background apps from doing things that require a DNS check).

*If this (or another post in this thread) fixes your problem/issue, please mark it as "accept-solution", and I'll tag it, to make it easier for others to find the answer(s). FYI: I'm an AT&T end-user, just like most of us in the forum. Thanks.

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
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Message 5 of 25
Contributor

Re: What is mdnsd and why is it killing my battery?

I also have determined that Facebook is the culprit for my MDNSD issue on my S5.  I've noticed that if I open Facebook and I get the header but no actual body to my newsfeed, then every single time this happens I can check setting and see that MDNSD is there at the top of the list, starting to hog up all resources.  If I reboot while on the charger/QI and leave it plugged in for stew minutes afterward, it clears it up (until the next flakey Facebook launch).  If I do a reboot while not on the charger or if I immediately take it off the charger, it is still there.

 

I'm running the latest version of Facebook (as of this date) but finding anyone with this same issue seems pretty difficult in my search (which is how I ended up here).

Message 6 of 25
Contributor

Re: What is mdnsd and why is it killing my battery?

I think I have the same issue. High battery use by MDNSD and pretty much only have Facebook running other than core apps. I noticed Facebook struggling to refresh and hangs. After about a minute, the feed loads. I might uninstall Facebook and just use the built-in browser for a while.
Message 7 of 25
Teacher

Re: What is mdnsd and why is it killing my battery?

Thank you, 

Message 8 of 25
Contributor

Re: What is mdnsd and why is it killing my battery?

I'm having the same problem and have tried deleting Firefox, Facebook, Messenger, and disable Chrome, and yet the process persists. I'm losing hope at this point.

Message 9 of 25
Teacher

Re: What is mdnsd and why is it killing my battery?

I uninstalled Facebook Messenger and noticed that the MDNSD power usage went down. I tried then to use the Facebook on the mobile site and making sure it worked fine, I uninstalled Facebook completely and the process seems to have disappeared. I think I also noticed improved battery usage. Will continue monitoring it, but there seems to be hope.

Message 10 of 25
ACE - Professor

Re: What is mdnsd and why is it killing my battery?

Yeah @alekdavis, that's sort of the nature of social-media apps, they're going to be really data-intensive, particularly depending on if you have a small refresh-window setting(s).  You can change this, which would probably help some, but ultimately the browser is going to be more efficient, at least with the current implementations.

I suspect that eventually things like FB mobile will become more flexible, allow you to choose who you get more frequent updates from, and how they receive notifications.  It's a tricky business, people want their latest updates, and security/reliability (hence a lot of DNS refreshes), but they also don't want to sacrifice battery.

You can sort of have two, frequent/accurate-safe/low-battery, choose two (no, not entirely scientific, but not a bad rule-of-thumb, not just for social-media apps) ;-]

*If this (or another post in this thread) fixes your problem/issue, please mark it as "accept-solution", and I'll tag it, to make it easier for others to find the answer(s). FYI: I'm an AT&T end-user, just like most of us in the forum. Thanks.

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 11 of 25
Teacher

Re: What is mdnsd and why is it killing my battery?

After a couple of days of not using the Facebook apps, it seems like I got a new phone. The battery life has improved drammatically. There is no MDNSD process in the battery usage. I'm so happy. The mobile Facebook web app works very similar to the app, except you cannot edit comments (I haven't tried uploading or posting so can't say how it works). I installed the Swipe app (from Google play), which is a lightweight Facebook mobile app wrapper. There are some bugs, but it allows me to read and post messages. Anyway, hope this helps someone.

Message 12 of 25
Contributor

Re: What is mdnsd and why is it killing my battery?

It's caused by the Facebook app, specifically the nearby friends feature. Uninstall FB, reboot phone, reinstall, but do NOT turn nearby fridnds back on. Problem solved! Hooray!

Message 13 of 25
Contributor

Re: What is mdnsd and why is it killing my battery?

It's caused by the Facebook app, specifically the "nearby friends" feature. Uninstall FB, reboot phone, reinstall, but do NOT turn the nearby friends feature back on. Problem solved! Hooray!

Message 14 of 25
Mentor

Re: What is mdnsd and why is it killing my battery?

I've never used or enabled "nearby friends" on Facebook and still have this process hogging battery.
Message 15 of 25
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