# ERROR: Could not find or load main class **URL:** \ **Category:** Logstash\ **Created:** [June 3, 2022, 7:46am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297 "2022-06-03T07:46:30Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![Wan\_Nur\_Athirah\_Wan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wan_nur_athirah_wan/32/101868_2.png) [@Wan\_Nur\_Athirah\_Wan](https://discuss.elastic.co/u/Wan_Nur_Athirah_Wan)\ **Post date:** [June 3, 2022, 7:46am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/1 "2022-06-03T07:46:30Z")
Hai. I have a problem regarding Logstash start. Before this when i use Logstash for ingestion, everything works well. but now, the Logstash seems having problem with java where the error as followed: ![Screenshot (689)](https://us1.discourse-cdn.com/elastic/original/3X/c/1/c1c3ced91f29bc81420cee53a179f77ddd4b6501.png) 1. I already have jre11 for jar file in lib. 2. I already added java as JAVA\_HOME 3. I already reinstall logstash but no changes in error. Do anyone have idea to solve this issue? Its important for me as I use this Logstash most of the time to ingest data for testing. ---
**Author:** ![sudhagar\_ramesh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhagar_ramesh/32/105673_2.png) [@sudhagar\_ramesh](https://discuss.elastic.co/u/sudhagar_ramesh)\ **Post date:** [June 3, 2022, 10:12am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/2 "2022-06-03T10:12:40Z")
Hello @Wan_Nur_Athirah_Wan in command prompt could you execute` javac -version` and `java -version` if the command output ended up with errors , there is issue with java. Keep posted!!! Thanks !!! ---
**Author:** ![Wan\_Nur\_Athirah\_Wan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wan_nur_athirah_wan/32/101868_2.png) [@Wan\_Nur\_Athirah\_Wan](https://discuss.elastic.co/u/Wan_Nur_Athirah_Wan)\ **Post date:** [June 9, 2022, 7:01am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/3 "2022-06-09T07:01:11Z")
![Screenshot (690)](https://us1.discourse-cdn.com/elastic/original/3X/6/7/67b9966a61c5a0b155313b23397c84d18a257652.png) Hai @sudhagar_ramesh . thanks for the reply. here is my screenshot for checking the java. there is nothing error occur when checking it ---
**Author:** ![sudhagar\_ramesh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhagar_ramesh/32/105673_2.png) [@sudhagar\_ramesh](https://discuss.elastic.co/u/sudhagar_ramesh)\ **Post date:** [June 13, 2022, 8:30am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/4 "2022-06-13T08:30:01Z")
Hello @Wan_Nur_Athirah_Wan Inorder to launch logstash , you have to use "logstash" command which will use that file in bin folder called as "logstash" with the file type "file" Hence please make use of below code snippet **Example1.conf** ```auto input { file { path =>"G:/XXXX/XXX/" start_position =>"beginning" } } output { stdout { codec => rubydebug } elasticsearch { hosts => "localhost:9200" user => "" password => "" index => "" } } ``` run that config file with this command `logstash -f Example1.conf` Keep Posted !!! Thanks !!! 🙂 ---
**Author:** ![Wan\_Nur\_Athirah\_Wan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wan_nur_athirah_wan/32/101868_2.png) [@Wan\_Nur\_Athirah\_Wan](https://discuss.elastic.co/u/Wan_Nur_Athirah_Wan)\ **Post date:** [June 15, 2022, 3:43am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/5 "2022-06-15T03:43:14Z")
Thanks @sudhagar_ramesh for the help. I will look into it using this suggestion. Right now i just ingesting data using python script align with Elasticsearch. ---
**Author:** ![sudhagar\_ramesh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhagar_ramesh/32/105673_2.png) [@sudhagar\_ramesh](https://discuss.elastic.co/u/sudhagar_ramesh)\ **Post date:** [June 27, 2022, 3:25am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/6 "2022-06-27T03:25:28Z")
Hello @Wan_Nur_Athirah_Wan Good day!!! Hope you have tried the suggestion and looking forward on the results ---
**Author:** ![Wan\_Nur\_Athirah\_Wan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wan_nur_athirah_wan/32/101868_2.png) [@Wan\_Nur\_Athirah\_Wan](https://discuss.elastic.co/u/Wan_Nur_Athirah_Wan)\ **Post date:** [June 27, 2022, 3:26am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/7 "2022-06-27T03:26:46Z")
Hi @sudhagar_ramesh . I just have time to look back the error. when i tried to run it, the error still the same. It cannot find the path of this logstash file. I believe if it cannot find this path, the whole thing that we want to run using logstash cannot been done. I found one topic related to this error, but theres no solution and the topic also already closed ---
**Author:** ![sudhagar\_ramesh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhagar_ramesh/32/105673_2.png) [@sudhagar\_ramesh](https://discuss.elastic.co/u/sudhagar_ramesh)\ **Post date:** [June 27, 2022, 3:32am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/8 "2022-06-27T03:32:14Z")
Could you get the path where logstash is in and set it as environment variables . Just copy the path -\> goto advanced settings -\> path (under System Variables) -\> paste the path and save it then in command prompt go to that drive where it is in and just type logstash Keep Posted!!! Thanks!!! ---
**Author:** ![Wan\_Nur\_Athirah\_Wan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wan_nur_athirah_wan/32/101868_2.png) [@Wan\_Nur\_Athirah\_Wan](https://discuss.elastic.co/u/Wan_Nur_Athirah_Wan)\ **Post date:** [June 27, 2022, 3:39am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/9 "2022-06-27T03:39:49Z")
I already create a path for logstash by pasting the path into system variables. and run the logstash. here the result: ![Screenshot (709)](https://us1.discourse-cdn.com/elastic/original/3X/3/0/300a33271dbdc8eede488b6fb9f777701ac420ea.png) ---
**Author:** ![sudhagar\_ramesh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhagar_ramesh/32/105673_2.png) [@sudhagar\_ramesh](https://discuss.elastic.co/u/sudhagar_ramesh)\ **Post date:** [June 27, 2022, 3:43am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/10 "2022-06-27T03:43:09Z")
could you try with this below command `logstash -f .\config\logstash_wl_general.conf` ---
**Author:** ![Wan\_Nur\_Athirah\_Wan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wan_nur_athirah_wan/32/101868_2.png) [@Wan\_Nur\_Athirah\_Wan](https://discuss.elastic.co/u/Wan_Nur_Athirah_Wan)\ **Post date:** [June 27, 2022, 3:44am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/11 "2022-06-27T03:44:48Z")
> [@sudhagar\_ramesh](#): > > logstash -f .\config\logstash\_wl\_general.conf here the result: C:\Users\Lenovo\Documents\elasticsearch-7.3.1-node-test\logstash-7.3.1\>logstash -f .\config\logstash\_wl\_general.conf 'logstash' is not recognized as an internal or external command, operable program or batch file. ---
**Author:** ![sudhagar\_ramesh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhagar_ramesh/32/105673_2.png) [@sudhagar\_ramesh](https://discuss.elastic.co/u/sudhagar_ramesh)\ **Post date:** [June 27, 2022, 3:45am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/12 "2022-06-27T03:45:30Z")
Just go to bin path of logstash and then execute ---
**Author:** ![Wan\_Nur\_Athirah\_Wan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wan_nur_athirah_wan/32/101868_2.png) [@Wan\_Nur\_Athirah\_Wan](https://discuss.elastic.co/u/Wan_Nur_Athirah_Wan)\ **Post date:** [June 27, 2022, 3:47am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/13 "2022-06-27T03:47:31Z")
Sorry @sudhagar_ramesh . but when I just execute it in bin folder, the command just disappeared. and when i execute by typing manually in command, the error still the same. cannot find the main class ---
**Author:** ![sudhagar\_ramesh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhagar_ramesh/32/105673_2.png) [@sudhagar\_ramesh](https://discuss.elastic.co/u/sudhagar_ramesh)\ **Post date:** [June 27, 2022, 4:30am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/14 "2022-06-27T04:30:35Z")
@Wan_Nur_Athirah_Wan the issue with java then, please reinstall your java to fix this issue. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 25, 2022, 4:31am UTC](https://discuss.elastic.co/t/error-could-not-find-or-load-main-class/306297/15 "2022-07-25T04:31:32Z")
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