# Cannot start ES after upgrading from 7.x to 8.x
**URL:** https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494
**Category:** Elasticsearch
**Created:** [September 20, 2023, 11:24pm UTC](https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494 "2023-09-20T23:24:24Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@roman-tasi](https://discuss.elastic.co/u/roman-tasi)
#### Post date: [September 20, 2023, 11:24pm UTC](https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494/1 "2023-09-20T23:24:24Z")
This is the error in my journalctl:
`Sep 20 11:39:43 ELK-Stack.uhtasi.local systemd[1]: Starting Elasticsearch...`
`Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd-entrypoint[29322]: Error occurred during initialization of boot layer`
`Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd-entrypoint[29322]: java.lang.module.ResolutionException: Modules jdk.compiler and tools export package com.sun.tools.javac to module com.sun.jna`
`Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd-entrypoint[29322]: ERROR: Elasticsearch exited unexpectedly, with exit code 1`
`Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd[1]: elasticsearch.service: main process exited, code=exited, status=1/FAILURE`
`Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd[1]: Failed to start Elasticsearch.`
If anyone can help
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [September 21, 2023, 6:25am UTC](https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494/2 "2023-09-21T06:25:40Z")
Could you share Elasticsearch full logs please?
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### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [September 21, 2023, 6:59am UTC](https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494/3 "2023-09-21T06:59:40Z")
Did you first upgrade to version 7.17 as outlined [in the documentation](https://www.elastic.co/guide/en/elasticsearch/reference/8.9/setup-upgrade.html)?
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### Author:  [@roman-tasi](https://discuss.elastic.co/u/roman-tasi)
#### Post date: [September 21, 2023, 5:56pm UTC](https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494/4 "2023-09-21T17:56:38Z")
Yes I resolved the issues in Upgrade Assistant prior to upgrading.
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### Author:  [@roman-tasi](https://discuss.elastic.co/u/roman-tasi)
#### Post date: [September 21, 2023, 5:56pm UTC](https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494/5 "2023-09-21T17:56:57Z")
It seems my `elasticsearch.log` actually isn't even being updated.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 19, 2023, 5:57pm UTC](https://discuss.elastic.co/t/cannot-start-es-after-upgrading-from-7-x-to-8-x/343494/6 "2023-10-19T17:57:37Z")
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