# Codecov randomly drops coverage

**URL:** <https://community.codecov.com/t/codecov-randomly-drops-coverage/1671>\
**Category:** Support\
**Created:** [June 30, 2020, 5:07pm UTC](https://community.codecov.com/t/codecov-randomly-drops-coverage/1671 "2020-06-30T17:07:41Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![dzikoysk](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/dzikoysk/32/903_2.png) [@dzikoysk](https://community.codecov.com/u/dzikoysk)\
**Post date:** [June 30, 2020, 5:07pm UTC](https://community.codecov.com/t/codecov-randomly-drops-coverage/1671/1 "2020-06-30T17:07:41Z")

</div>

### Description

Well, I have no idea why, but Codecov randomly drops coverage despite passing build on Travis. List of recent commits:

> **[Code coverage done right.](https://app.codecov.io/gh/dzikoysk/reposilite/branch/master/commits)**
>
> Hosted coverage report highly integrated with GitHub, Bitbucket and GitLab. Awesome pull request comments to enhance your QA.

### Repository

> **[GitHub - dzikoysk/reposilite: Lightweight and easy-to-use repository management...](https://github.com/dzikoysk/reposilite)**
>
> Lightweight and easy-to-use repository management software dedicated for the Maven-based artifacts in the JVM ecosystem 📦

### CI/CD

> **[Travis CI](https://app.travis-ci.com/github/dzikoysk/reposilite)**
>
> Travis CI enables your team to test and ship your apps with confidence. Easily sync your projects with Travis CI and you'll be testing your code in minutes.

### Uploader

Repeated bash (it does not affect this issue, the problem was that codecov sometimes just didnt respond immediately)

> <https://github.com/dzikoysk/reposilite/blob/7992f0f0f6448d93e66922d126319b5daef5269a/.travis.yml#L14>

### Commit SHAs

7992f0f0f6448d93e66922d126319b5daef5269a

### Codecov YAML

> <https://github.com/dzikoysk/reposilite/blob/main/codecov.yml>

### Codecov Output

A little dirty due to missing formatting of CLI colors

```bash
e[0K$ bash <(curl -s https://codecov.io/bash) || (sleep 5 && bash <(curl -s https://codecov.io/bash)) || (sleep 5 && bash <(curl -s https://codecov.io/bash)) || (sleep 5 && bash <(curl -s https://codecov.io/bash)) || (sleep 5 && bash <(curl -s https://codecov.io/bash))

  _____ _
 / ____ | | |
| | _____ | | ______  _______
| | / _ \ / _` |/ _ \/ __/ _ \ \ / /
| |___| (_) | (_| |__/ (_| (_) \ V /
 \ _____\___ / \ __,_|\___ |\ ___\___ / \_/
                              Bash-20200629-ffaf297

e[0;90m==>e[0m Travis CI detected.
    e[0;90mproject root:e[0m .
    e[0;90mYaml found at:e[0m codecov.yml
e[0;90m==>e[0m Running gcov in . e[0;90m(disable via -X gcov)e[0m
e[0;90m==>e[0m Python coveragepy not found
e[0;90m==>e[0m Searching for coverage reports in:
    e[0;32m+e[0m .
    e[0;90m->e[0m Found 1 reports
e[0;90m==>e[0m Detecting git/mercurial file structure
e[0;90m==>e[0m Appending build variables
    e[0;32m+e[0m TRAVIS_OS_NAME
    e[0;32m+e[0m openjdk8
e[0;90m==>e[0m Reading reports
    e[0;32m+e[0m ./reposilite-backend/target/site/jacoco/jacoco.xml e[0;90mbytes=201666e[0m
e[0;90m==>e[0m Appending adjustments
    e[0;36mhttps://docs.codecov.io/docs/fixing-reportse[0m
    e[0;90m->e[0m No adjustments found
e[0;90m==>e[0m Gzipping contents
e[0;90m==>e[0m Uploading reports
    e[0;90murl:e[0m https://codecov.io
    e[0;90mquery:e[0m branch=master&commit=7992f0f0f6448d93e66922d126319b5daef5269a&build=292.1&build_url=&name=&tag=&slug=dzikoysk%2Freposilite&service=travis&flags=&pr=false&job=355907982
e[0;90m->e[0m Pinging Codecov
https://codecov.io/upload/v4?package=bash-20200629-ffaf297&token=secret&branch=master&commit=7992f0f0f6448d93e66922d126319b5daef5269a&build=292.1&build_url=&name=&tag=&slug=dzikoysk%2Freposilite&service=travis&flags=&pr=false&job=355907982
e[0;90m->e[0m Uploading to
https://storage.googleapis.com/codecov/v4/raw/2020-06-30/EDB243A5518D3BC8C6A33D4BE0022526/7992f0f0f6448d93e66922d126319b5daef5269a/74b28494-172a-4d9d-a6b8-0d3d6b2df672.txt?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=GOOG1EQX6OZVJGHKK3633AAFGLBUCOOATRACRQRQF6HMSMLYUP6EAD6XSWAAY%2F20200630%2FUS%2Fs3%2Faws4_request&X-Amz-Date=20200630T160456Z&X-Amz-Expires=10&X-Amz-SignedHeaders=host&X-Amz-Signature=88b79b945c45c9e85e8f9c0a0b746a632e11f721cfe5f23b0a34876f15efc381
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed

  0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
100 13751 0 0 100 13751 0 52269 --:--:-- --:--:-- --:--:-- 52484
    e[0;32m->e[0m View reports at e[0;36mhttps://codecov.io/github/dzikoysk/reposilite/commit/7992f0f0f6448d93e66922d126319b5daef5269ae[0m
travis_time:end:1b689a96:start=1593533095527380243,finish=1593533096775554638,duration=1248174395,event=after_success
e[0Ktravis_fold:end:after_success
e[0K
Done. Your build exited with 0.

```

---

<div class="post-metadata">

**Author:** ![tom](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/tom/32/8_2.png) [@tom](https://community.codecov.com/u/tom)\
**Post date:** [July 1, 2020, 12:07am UTC](https://community.codecov.com/t/codecov-randomly-drops-coverage/1671/2 "2020-07-01T00:07:00Z")

</div>

Hi @dzikoysk, doing a little digging, I compared your raw coverage reports for a [covered commit](https://codecov.io/gh/dzikoysk/reposilite/commit/3b70d70a4e9299a2a8947236c900a297a3033cb7/build) and an [uncovered commit](https://codecov.io/gh/dzikoysk/reposilite/commit/7992f0f0f6448d93e66922d126319b5daef5269a/build)

If you open up the builds and diff the xml, you’ll notice that they are showing up as uncovered in the 0% commit.

uncovered:

```auto
         <method name="&lt;init&gt;" desc="(Lorg/panda_lang/reposilite/Reposilite;)V" line="45">
            <counter type="INSTRUCTION" missed="22" covered="0" />
            <counter type="LINE" missed="7" covered="0" />
            <counter type="COMPLEXITY" missed="1" covered="0" />
            <counter type="METHOD" missed="1" covered="0" />
         </method>

```

covered:

```auto
<class name="org/panda_lang/reposilite/repository/DeployController" sourcefilename="DeployController.java">
         <method name="&lt;init&gt;" desc="(Lorg/panda_lang/reposilite/Reposilite;)V" line="45">
            <counter type="INSTRUCTION" missed="0" covered="22" />
            <counter type="LINE" missed="0" covered="7" />
            <counter type="COMPLEXITY" missed="0" covered="1" />
            <counter type="METHOD" missed="0" covered="1" />
         </method>

```

The only other difference I could find was the presense of xml tags like `<sessioninfo id="localhost-7eefd00a" start="1593510762671" dump="1593510782093"/>`

I think there might be something going wrong with the way you are collecting coverage reports.

---

<div class="post-metadata">

**Author:** ![dzikoysk](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/dzikoysk/32/903_2.png) [@dzikoysk](https://community.codecov.com/u/dzikoysk)\
**Post date:** [July 6, 2020, 2:27pm UTC](https://community.codecov.com/t/codecov-randomly-drops-coverage/1671/3 "2020-07-06T14:27:15Z")

</div>

Thanks for a guide @tom ❤ I’ve reported this issue to JaCoCo team and it looks like I’ve experienced bug in jdk, I’m leaving it for the record:

- [JaCoCo randomly generates 0% test coverage reports · Issue #1066 · jacoco/jacoco · GitHub](https://github.com/jacoco/jacoco/issues/1066)

I hope that it might be helpful for someone in the future.

---

<div class="post-metadata">

**Author:** ![tom](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.codecov.com/tom/32/8_2.png) [@tom](https://community.codecov.com/u/tom)\
**Post date:** [July 6, 2020, 2:42pm UTC](https://community.codecov.com/t/codecov-randomly-drops-coverage/1671/4 "2020-07-06T14:42:47Z")

</div>

Wow incredible @dzikoysk. Glad that you were able to get it resolved!