Source resource pool drain timed out

[guyisra]

Using latest openmaptiles, I sometimes get the following error after the generate step, and after the logs show it reached 100%

[Error: Source resource pool drain timed out after 5s]

Is this a known issue?

[typebrook]

Same problem here when I am generating tiles from custom contour layer

this error message should be from tilelive-bridge
mapbox/tilelive-bridge#80
https://github.com/mapbox/tilelive-bridge/blob/master/test/close-timeout.test.js

[baconYao]

I got same problem. The error happened after reaching 100%.

.
.
.
[7d 6h 57m 32.4320000000298s]  99.9998%  9.15m/ 9.15m @   72/s | ✓ 9.15m □ 2.04m | 0s left
[7d 6h 57m 32.53799999994226s]  99.9999%  9.15m/ 9.15m @   72/s | ✓ 9.15m □ 2.04m | 0s left
[7d 6h 57m 32.618000000016764s]  99.9999%  9.15m/ 9.15m @   72/s | ✓ 9.15m □ 2.04m | 0s left
[7d 6h 57m 32.73199999995995s] 100.0000%  9.15m/ 9.15m @   72/s | ✓ 9.15m □ 2.04m | 0s left
[7d 6h 57m 32.73499999998603s] 100.0000%  9.15m/ 9.15m @   72/s | ✓ 9.15m □ 2.04m | 0s left

[Error: Source resource pool drain timed out after 5s]

Does anyone find the solution?