Why am I getting Unknown error in line 1 of pom xml

Question

Getting unknown error at Line 1 in pom xml in Eclipse IDE  It was working fine till yesterday  but all of a sudden after updating my project from master and after fixing merge conflicts getting  Unknown error  in pom xml  Except me  none of my teammates are facing this issue  I also changed the workspace  deleted cache but still no luck    I am using the h2 database for this project  in spite of inserting values in data sql  it is not picking up any values and inserting into h2 DB tables  Before this issue  it was working fine  I feel its due to the issue in pom xml  I am not sure though  Please help  I deleted the existing project and took the latest code from master  After that deleted  m2 folder under users including the repository folder   I did update project and enabled Forced update of snapshots releases  maven clean and maven build  But nothing helps   pom xml   lt  xml version  1 0  encoding  UTF-8   gt   lt project xmlns  http   maven apache org POM 4 0 0  xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xsi schemaLocation  http   maven apache org POM 4 0 0 http   maven apache org xsd maven-4 0 0 xsd  gt       lt modelVersion gt 4 0 0 lt  modelVersion gt        lt groupId gt com abc roster lt  groupId gt       lt artifactId gt spring-boot-roster-app lt  artifactId gt       lt version gt 0 0 1-SNAPSHOT lt  version gt       lt packaging gt jar lt  packaging gt       lt name gt spring-boot-roster-app lt  name gt       lt description gt Demo project for Spring Boot Roster lt  description gt        lt parent gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-parent lt  artifactId gt           lt version gt 2 2 0 BUILD-SNAPSHOT lt  version gt           lt relativePath   gt   lt  -- lookup parent from repository -- gt       lt  parent gt        lt properties gt           lt project build sourceEncoding gt UTF-8 lt  project build sourceEncoding gt           lt project reporting outputEncoding gt UTF-8 lt  project reporting outputEncoding gt           lt java version gt 1 8 lt  java version gt           lt  --  lt start-class gt com infosys roster SpringBootRosterAppApplication lt  start-class gt  -- gt       lt  properties gt        lt dependencies gt           lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter lt  artifactId gt           lt  dependency gt           lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-security lt  artifactId gt           lt  dependency gt           lt  --encryption lib -- gt           lt dependency gt               lt groupId gt org jasypt lt  groupId gt               lt artifactId gt jasypt lt  artifactId gt               lt version gt 1 9 2 lt  version gt           lt  dependency gt            lt dependency gt               lt groupId gt org jasypt lt  groupId gt               lt artifactId gt jasypt-springsecurity3 lt  artifactId gt               lt version gt 1 9 0 lt  version gt           lt  dependency gt            lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-test lt  artifactId gt               lt scope gt test lt  scope gt           lt  dependency gt           lt dependency gt               lt groupId gt org springframework lt  groupId gt               lt artifactId gt spring-web lt  artifactId gt           lt  dependency gt           lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-web lt  artifactId gt           lt  dependency gt            lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-data-jpa lt  artifactId gt           lt  dependency gt            lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-data-rest lt  artifactId gt           lt  dependency gt            lt dependency gt               lt groupId gt com h2database lt  groupId gt               lt artifactId gt h2 lt  artifactId gt               lt scope gt runtime lt  scope gt            lt  dependency gt     lt  --         lt dependency gt  -- gt   lt  --          lt groupId gt org hibernate lt  groupId gt  -- gt   lt  --          lt artifactId gt hibernate-core lt  artifactId gt  -- gt   lt  --          lt version gt 5 2 10 Final lt  version gt  -- gt   lt  --    lt  dependency gt  -- gt            lt  --  lt dependency gt  -- gt           lt  --  lt groupId gt io springfox lt  groupId gt  -- gt           lt  --  lt artifactId gt springfox-swagger2 lt  artifactId gt  -- gt           lt  --  lt version gt 2 7 0 lt  version gt  -- gt           lt  --  lt scope gt compile lt  scope gt  -- gt           lt  --  lt  dependency gt  -- gt             lt  --  lt dependency gt  -- gt           lt  --  lt groupId gt io springfox lt  groupId gt  -- gt           lt  --  lt artifactId gt springfox-swagger-ui lt  artifactId gt  -- gt           lt  --  lt version gt 2 7 0 lt  version gt  -- gt           lt  --  lt scope gt compile lt  scope gt  -- gt           lt  --  lt  dependency gt  -- gt            lt  --  lt dependency gt  -- gt           lt  --  lt groupId gt io springfox lt  groupId gt  -- gt           lt  --  lt artifactId gt springfox-data-rest lt  artifactId gt  -- gt           lt  --  lt version gt 2 7 0 lt  version gt  -- gt           lt  --  lt  dependency gt  -- gt       lt  dependencies gt        lt build gt           lt plugins gt               lt plugin gt                   lt groupId gt org springframework boot lt  groupId gt                   lt artifactId gt spring-boot-maven-plugin lt  artifactId gt               lt  plugin gt           lt  plugins gt       lt  build gt        lt repositories gt           lt repository gt               lt id gt spring-snapshots lt  id gt               lt name gt Spring Snapshots lt  name gt               lt url gt https   repo spring io snapshot lt  url gt               lt snapshots gt                   lt enabled gt true lt  enabled gt               lt  snapshots gt           lt  repository gt           lt repository gt               lt id gt spring-milestones lt  id gt               lt name gt Spring Milestones lt  name gt               lt url gt https   repo spring io milestone lt  url gt           lt  repository gt       lt  repositories gt       lt pluginRepositories gt           lt pluginRepository gt               lt id gt spring-snapshots lt  id gt               lt name gt Spring Snapshots lt  name gt               lt url gt https   repo spring io snapshot lt  url gt               lt snapshots gt                   lt enabled gt true lt  enabled gt               lt  snapshots gt           lt  pluginRepository gt           lt pluginRepository gt               lt id gt spring-milestones lt  id gt               lt name gt Spring Milestones lt  name gt               lt url gt https   repo spring io milestone lt  url gt           lt  pluginRepository gt       lt  pluginRepositories gt    lt  project gt     application properties  server port  spring h2 console path  h2 spring h2 console enabled true  spring datasource url    spring datasource username  spring datasource password  spring datasource driverClassName org h2 Driver spring datasource platform h2 spring datasource initialization-mode always  spring jpa hibernate ddl-auto update spring datasource continue-on-error true  spring jpa show-sql true spring jpa properties hibernate format sql false  spring jpa properties hibernate dialect org hibernate dialect H2Dialect   Should remove unknown error in pom xml and also I must be able to populate values in H2 db

User · Answer

For me I changed  in the parent tag of the pom xml and it solved it change 2 1 5 to 2 1 4 then Maven-  Update Project

User · Answer

In my pom xml file I had to downgrade the version from 2 1 6 RELEASE for   spring-boot-starter-parent artifact to 2 1 4 RELEASE    lt parent gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-parent lt  artifactId gt           lt version gt 2 1 6 RELEASE lt  version gt           lt relativePath   gt   lt  -- lookup parent from repository -- gt   lt  parent gt    to be changed to    lt parent gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-parent lt  artifactId gt           lt version gt 2 1 4 RELEASE lt  version gt           lt relativePath   gt   lt  -- lookup parent from repository -- gt   lt  parent gt    And that weird Unknown error disappeared

User · Answer

answer according to current status  This issue got fixed      Please install the m2e connector for mavenarchiver plugin 0 17 3 from https   download eclipse org m2e-wtp releases 1 4      obsolete answer  A less profound change than a downgrade from Spring Boot 2 1 5 RELEASE to 2 1 4 RELEASE would be downgrading only the affected Maven JAR Plugin from 3 1 2 to 3 1 1 as long as this bug exists    lt properties gt       lt  --     -- gt       lt maven-jar-plugin version gt 3 1 1 lt  maven-jar-plugin version gt   lt  properties gt

User · Answer

For me  changing pom xml for SpringBoot 2 project from 2 1 6 RELEASE    lt parent gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-parent lt  artifactId gt           lt version gt 2 1 6 REL enter code here EASE lt  version gt           lt relativePath   gt   lt  -- lookup parent from repository -- gt   lt  parent gt    to 2 1 4 RELEASE verified and works   lt parent gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-parent lt  artifactId gt           lt version gt 2 1 4 RELEASE lt  version gt           lt relativePath   gt   lt  -- lookup parent from repository -- gt   lt  parent gt

User · Answer

You must to upgrade the m2e connector  It s a known bug  but there is a solution   Into Eclipse click  quot Help quot   gt   quot Install new Software    quot   Appears a window  In the  quot Install quot  window  2a  Into the input box  quot Work with quot   enter next site location and press Enter https   download eclipse org m2e-wtp releases 1 4  2b  Appears a lot of information into  quot Name quot  input Box  Select all the items 2c  Click  quot Next quot  Button    Finish the installation and restart Eclipse

User · Answer

Got this error on eclipse IDE version 4 10  Spring boot 2 2 0 M4  changed the Spring boot version to 2 2 0 M2  after many other solutions recommended and it solved the error   Maybe something missing or broken in the latest version of Spring boot starter project module maven POM

User · Answer

Add  lt maven-jar-plugin version gt 3 1 1 lt  maven-jar-plugin version gt  in property tag problem resolve https   medium com  saannjaay unknown-error-in-pom-xml-66fb2414991b

User · Answer

For me I changed in the parent tag of the pom xml and it solved it change 2 1 5 to 2 1 4 then Maven- gt  Update Project  its worked for me also

User · Answer

While I cannot reproduce your error  as none of your team mates can either   I have a suggestion  that might help you   Have you heard of the Byte Order Mark  As it appears on line 1 it is a likely candidate for your troubles  Maybe you changed a setting somewhere that somehow leads to the error  This quote from the Wikipedia article is particularly relevant I think      BOM use is optional  Its presence interferes with the use of UTF-8 by software that does not expect non-ASCII bytes at the start of a file but that could otherwise handle the text stream

User · Answer

There is a bug about Eclipse and spring-boot-starter-parent 2 1 5   if the maven packaging attribute is war then no problem The problem is in jar type   So you can also fix this problem by changing packaging type    lt packaging gt war lt  packaging gt

User · Answer

same problem for me  original code from spring starter demo gives unknown error on line 1    lt  xml version  1 0  encoding  UTF-8   gt   lt project xmlns  http   maven apache org POM 4 0 0  xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xsi schemaLocation  http   maven apache org POM 4 0 0 http   maven apache org xsd maven-4 0 0 xsd  gt   lt modelVersion gt 4 0 0 lt  modelVersion gt   lt parent gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-parent lt  artifactId gt       lt version gt 2 1 6 RELEASE lt  version gt       lt relativePath  gt   lt  -- lookup parent from repository -- gt   lt  parent gt        Changing just the version of 2 1 6 RELEASE to 2 1 4 RELEASE fixes the problem

User · Answer

I was getting same error in Version 3  It worked after upgrading STS to latest version  4 5 1 RELEASE  No change in code or configuration in latest STS was required

User · Answer

Following actions worked for me   1 Go to Project in toolbar -  Unchecked  Build Automatically   2 In POM File Downgrade the spring-boot version to 2 1 4 RELEASE   3 Right Click on Project name -  Select Maven -  Click on  Update Project   - OK Wait till all the maven dependency to get downloaded Need internet

User · Answer

I updated spring tool suits by going help   check for update

User · Answer

You just need a latest Eclipse or Spring tool suite 4 5 and above Nothing else refresh project and it works

User · Answer

As per the suggestion from  Shravani  in my pom xml file  I changed my version number in the  area from this    lt parent gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-parent lt  artifactId gt       lt version gt 2 1 5 RELEASE lt  version gt       lt relativePath  gt   lt  -- lookup parent from repository -- gt   lt  parent gt    to this    lt parent gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-parent lt  artifactId gt       lt version gt 2 1 4 RELEASE lt  version gt       lt relativePath  gt   lt  -- lookup parent from repository -- gt   lt  parent gt    I then right clicked on the project and did a  Maven -  Update project      This made the problem go away for me

User · Answer

whenever you facing this type of error simply change the Release version  just like In my case  it is showing Error in 2 2 7 I changed to 2 2 6  Problem    lt groupId gt org springframework boot lt  groupId gt   lt artifactId gt spring-boot-starter-parent lt  artifactId gt   lt version gt 2 2 7 RELEASE lt  version gt    Solution    lt groupId gt org springframework boot lt  groupId gt   lt artifactId gt spring-boot-starter-parent lt  artifactId gt   lt version gt 2 2 6 RELEASE lt  version gt

User · Answer

Simply add below maven jar version in properties tag in pom xml   lt maven-jar-plugin version gt 3 1 1 lt  maven-jar-plugin version gt  Then follow below steps  Step 1  mvn clean Step 2   update project Problem solved for me  You should also try this

User · Answer

Add 3 1 1 in to properties like below than fix issue   lt properties gt           lt java version gt 1 8 lt  java version gt           lt maven-jar-plugin version gt 3 1 1 lt  maven-jar-plugin version gt   lt  properties gt    Just Update Project    right click    Maven   Update Project

[java] Why am I getting Unknown error in line 1 of pom.xml?

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