# Segmentation Fault Error - CLI Linux

**URL:** <https://forum.autonomys.xyz/t/segmentation-fault-error-cli-linux/343>\
**Category:** Support\
**Tags:** cli, linux\
**Created:** [June 14, 2022, 3:50pm UTC](https://forum.autonomys.xyz/t/segmentation-fault-error-cli-linux/343 "2022-06-14T15:50:29Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![wei](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.autonomys.xyz/wei/32/154_2.png) [@wei](https://forum.autonomys.xyz/u/wei)\
**Post date:** [June 14, 2022, 3:50pm UTC](https://forum.autonomys.xyz/t/segmentation-fault-error-cli-linux/343/1 "2022-06-14T15:50:29Z")

</div>

The user reported after stopping node and farmer restarting them (CLI), they would get the segmentation error.

 ![seg2](https://canada1.discourse-cdn.com/flex011/uploads/subspace/original/1X/da82f10f8c6e1c37d01a83905c617e21c13890da.png)

Additional info shared below.  
The server has 16 Gb RAM

 ![image](https://canada1.discourse-cdn.com/flex011/uploads/subspace/original/1X/29ca04f7863b2897b392709cb0c73b7794238a8a.png)  
 ![image](https://canada1.discourse-cdn.com/flex011/uploads/subspace/original/1X/d854d76fef304e8bed4fa814c0c88b2e84877271.png)  
 ![image](https://canada1.discourse-cdn.com/flex011/uploads/subspace/original/1X/5c5519c07d778198ffb54dc011464b85b897cee9.png)

After that I restart software by

```auto
systemctl restart subspace-node.service subspace-farmer.service

```

So far everything looks good, let’s wait for a full synchronization and I’ll send the result

 ![image](https://canada1.discourse-cdn.com/flex011/uploads/subspace/original/1X/18255bb459d83501d0269ed56e85d663933cfd8c.jpeg)  
 ![image](https://canada1.discourse-cdn.com/flex011/uploads/subspace/original/1X/7e1fcd3951aea0836e080c8303e1cde8569be196.png)

OS - Ubuntu 20.04, all the characteristics are exactly the sam as those of other servers that work correctly.

```auto
[501279.671842] tokio-runtime-w[653759]: segfault at 0 ip 0000555727c851af sp 00007f7e59c3ea58 error 4 in subspace-farmer[5557271ef000+b07000]
[501279.671856] Code: 6e ef 66 48 0f 6e f3 48 83 ec 40 44 8b 07 44 8b 4f 04 44 8b 57 08 44 8b 5f 0c 44 8b 67 10 44 8b 6f 14 44 8b 77 18 44 8b 7f 1c <8b> 1e 0f cb 89 1c 24 44 89 e0 c1 c8 0e 44 31 e0 c1 c8 05 44 31 e0
[501388.140144] tokio-runtime-w[653907]: segfault at 0 ip 0000555e555991af sp 00007f64f536dbf8 error 4 in subspace-farmer[555e54b03000+b07000]
[501388.140176] Code: 6e ef 66 48 0f 6e f3 48 83 ec 40 44 8b 07 44 8b 4f 04 44 8b 57 08 44 8b 5f 0c 44 8b 67 10 44 8b 6f 14 44 8b 77 18 44 8b 7f 1c <8b> 1e 0f cb 89 1c 24 44 89 e0 c1 c8 0e 44 31 e0 c1 c8 05 44 31 e0
[502085.055799] sh (654242): drop_caches: 3
[505684.285657] sh (655550): drop_caches: 3
[509283.864710] sh (656559): drop_caches: 3
[512883.410954] sh (657638): drop_caches: 3
[516483.845197] sh (658999): drop_caches: 3
[520083.080467] sh (660358): drop_caches: 3
[523683.754795] sh (660889): drop_caches: 3
[525516.481237] tokio-runtime-w[661424]: segfault at 0 ip 0000560cff9701af sp 00007f81573f4b98 error 4 in subspace-farmer[560cfeeda000+b07000]
[525516.481373] Code: 6e ef 66 48 0f 6e f3 48 83 ec 40 44 8b 07 44 8b 4f 04 44 8b 57 08 44 8b 5f 0c 44 8b 67 10 44 8b 6f 14 44 8b 77 18 44 8b 7f 1c <8b> 1e 0f cb 89 1c 24 44 89 e0 c1 c8 0e 44 31 e0 c1 c8 05 44 31 e0
[525550.129089] tokio-runtime-w[661756]: segfault at a28528df ip 000055d48a4ee1af sp 00007f08377f7638 error 4 in subspace-farmer[55d489a58000+b07000]
[525550.129105] Code: 6e ef 66 48 0f 6e f3 48 83 ec 40 44 8b 07 44 8b 4f 04 44 8b 57 08 44 8b 5f 0c 44 8b 67 10 44 8b 6f 14 44 8b 77 18 44 8b 7f 1c <8b> 1e 0f cb 89 1c 24 44 89 e0 c1 c8 0e 44 31 e0 c1 c8 05 44 31 e0

```

Rebooting the server did not help, error is

```auto
2022-06-14T18:27:59.427373Z INFO subspace_farmer::commands::farm: WS RPC server listening on 127.0.0.1:9955
2022-06-14T18:28:00.002464Z INFO subspace_farmer::farming: Salt updated, recommitting in background new_salt=79f25142c329a0d0
2022-06-14T18:28:00.002694Z INFO subspace_farmer::farming: Salt updated, recommitting in background new_salt=79f25142c329a0d0
2022-06-14T18:28:11.732664Z ERROR subspace_farmer::plotting: Failed to write encoded pieces error=Corruption: Compaction sees out-of-order keys.
2022-06-14T18:28:12.182849Z INFO subspace_farmer::archiving: Plotted segment segment_index=108478
subspace-farmer.service: Main process exited, code=killed, status=11/SEGV
subspace-farmer.service: Failed with result 'signal'.
subspace-farmer.service: Scheduled restart job, restart counter is at 19.
Stopped Subspace Farmer.
Started Subspace Farmer.

```

`2022-06-14T18:29:03.340039Z ERROR subspace_farmer::plotting: Failed to write encoded pieces error=Corruption: Compaction sees out-of-order keys.`

---

<div class="post-metadata">

**Author:** ![ImmaZoni](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.autonomys.xyz/immazoni/32/7_2.png) [@ImmaZoni](https://forum.autonomys.xyz/u/ImmaZoni)\
**Post date:** [June 14, 2022, 9:05pm UTC](https://forum.autonomys.xyz/t/segmentation-fault-error-cli-linux/343/2 "2022-06-14T21:05:57Z")

</div>

Duplicate of this post [Farmer: Main process exited, code=killed, status=11/SEGV](https://forum.autonomys.xyz/t/farmer-main-process-exited-code-killed-status-11-segv/335)

Currently being escalated to a developer