issue_comments: 511136084

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https://github.com/pydata/xarray/issues/3041#issuecomment-511136084 https://api.github.com/repos/pydata/xarray/issues/3041 511136084 MDEyOklzc3VlQ29tbWVudDUxMTEzNjA4NA== 2783717 2019-07-13T16:38:14Z 2019-07-13T16:39:25Z NONE

Apparently in CPython this happens if you have a reference cycle.

AFAIK this is no longer true after Python 3.4.

I took a look with @delandmeterp and found that manually adding a gc.collect() (which collects all cycles) after deleting temp fixes the issue. The cycle was keeping the object around longer than expected, resulting in the lock error. It's not clear to me where the cycle is coming from (I'm not familiar with xarray internals), but this is indeed the issue.

 
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