Problem with one of the node using distributed rendering

[christophe_hurgon]

We have 4 nodes. 3 are working fine, one is stuck on the buckets. They appear pixelated and not rendering properly.
A photo is showing what's happening, the purple buckets are the one from the node ( IP finishing with 249 / Pablo-pc ), they accumulate but not rendering.
Log:

[17:16:33.800] Server 192.168.0.249:20204: Scene loaded; starting render
[17:16:52.903] Server 192.168.0.249:20204: Starting frame 0
[17:18:05.978] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.093] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.207] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.324] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.454] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.573] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.683] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.793] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:06.904] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:07.017] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:07.126] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:07.236] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:07.347] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:07.457] Sending 4200004 bytes of irradiance map to pablo-pc
[17:18:07.566] Sending 634372 bytes of irradiance map to pablo-pc
[17:19:22.231] Bitmap file "Y:\LIBRARY\COSMOS ASSETS\Packages\3D_Models\People\Elbert_Walking_00 1_e74f9323\Assets\e74f9323_Phone_Nrm_3dh_raw.tx" loaded.
[17:19:22.357] Bitmap file "Y:\LIBRARY\COSMOS ASSETS\Packages\3D_Models\People\Elbert_Walking_00 1_e74f9323\Assets\e74f9323_Phone_Rough_3dh_raw.tx" loaded.
[17:23:56.047] Task ended : Rendering image... (completed in 0h 7m 24.9s)
[17:23:57.015] Number of raycasts: 2271976208 (129.83 per pixel)
[17:23:57.015] Camera rays: 250773684 (14.33 per pixel)
[17:23:57.015] Shadow rays: 1171046079 (66.92 per pixel)
[17:23:57.015] GI rays: 304320811 (17.39 per pixel)
[17:23:57.015] Reflection rays: 96640256 (5.52 per pixel)
[17:23:57.022] Refraction rays: 11442258 (0.65 per pixel)
[17:23:57.022] Unshaded rays: 435254347 (24.87 per pixel)
[17:23:57.024] Peak memory for frame 0: 10.86 GiB collected for 22 categories
[17:23:57.024] Peak memory for "Bitmap": 625.67 MiB
[17:23:57.024] Peak memory for "Bucket image sampler": 1.08 GiB
[17:23:57.025] Peak memory for "Dynamic displaced geometry": 0 B
[17:23:57.025] Peak memory for "Dynamic geometry": 1.71 GiB
[17:23:57.025] Peak memory for "Dynamic moving displaced geometry": 0 B
[17:23:57.025] Peak memory for "Dynamic moving geometry": 0 B
[17:23:57.025] Peak memory for "GI": 12.54 MiB
[17:23:57.026] Peak memory for "Lights": < 1 MiB
[17:23:57.026] Peak memory for "Misc.": 728.65 MiB
[17:23:57.026] Peak memory for "Misc. displaced geometry": 0 B
[17:23:57.026] Peak memory for "Misc. geometry": < 1 MiB
[17:23:57.026] Peak memory for "Misc. moving displaced geometry": 0 B
[17:23:57.030] Peak memory for "Misc. moving geometry": 0 B
[17:23:57.030] Peak memory for "Progressive image sampler": 0 B
[17:23:57.031] Peak memory for "Static displaced geometry": 0 B
[17:23:57.031] Peak memory for "Static geometry": 2.54 GiB
[17:23:57.031] Peak memory for "Static hair": 0 B
[17:23:57.032] Peak memory for "Static moving displaced geometry": 0 B
[17:23:57.033] Peak memory for "Static moving geometry": 0 B
[17:23:57.033] Peak memory for "Static moving hair": 0 B
[17:23:57.034] Peak memory for "Tiled bitmap": 1.04 GiB
[17:23:57.035] Peak memory for "VFB": 3.15 GiB
[17:23:57.036] Light cache utilization: 100.00%
[17:23:57.036] Premultiplied light cache utilization: 100.00%
[17:23:57.505] Maximum memory usage for resman: 3951.94 MB
[17:23:58.065] Number of intersectable primitives: 23958847
[17:23:58.066] SD triangles: 23938373
[17:23:58.069] MB triangles: 0
[17:23:58.069] Static primitives: 20473
[17:23:58.069] Moving primitives: 0
[17:23:58.069] Infinite primitives: 1
[17:23:58.069] Static hair segments: 0
[17:23:58.070] Moving hair segments: 0
[17:23:58.231] Region rendering: 541.2 s
[17:23:58.231] Total frame time: 548.4 s
[17:23:59.003] Maximum memory usage for texman: 0.00 MB
[17:23:59.009] Maximum memory usage for attributes: 0.00 MB
[17:23:59.012] Total sequence time: 550.5 s
[17:23:59.012] Warning : 0 error(s), 3 warning(s)
[17:23:59.012] ================================
[17:24:36.051] Log verbosity changed to "All"

[vladimir_krastev]

Hi, thanks for posting. Do you have enough RAM on your render nodes? A render node could have ran out of memory and swapping parts of the scene to the hard drive. This slows down the distributed rendering process significantly. Many times it is so slow that buckets like in your render could stand still for many hours. Please make sure you are not running out of RAM. Please use the VRayDRBucket render element to determine which computer is causing the issue.
We highly recommend not to use irradiance map. This feature is no longer updated and going like that for a long time now. Please use BruteForce/LigthtCache method. It produces much better results and if the speed is you concern just drop the image sampler settings and use stronger denoiser settings.
If you can't manage on your own please send us the scene for review.