Maven compiles old servlet dependency - maven

Question

For some reason Maven is compiling old servlet dependency instead of the new one. I've tried to clean up cache using:
mvn dependency:purge-local-repository -DreResolve=false
and
mvn dependency:resolve
And that's what logs gave me:
[INFO]
[INFO] --- maven-dependency-plugin:2.8:resolve (default-cli) # examproject ---
[INFO]
[INFO] The following files have been resolved:
[INFO] com.google.cloud:google-cloud-core-http:jar:1.84.0:compile
[INFO] com.google.cloud.datastore:datastore-v1-proto-client:jar:1.6.0:compile
[INFO] org.threeten:threetenbp:jar:1.3.3:compile
[INFO] com.google.protobuf:protobuf-java:jar:3.7.1:compile
[INFO] io.grpc:grpc-core:jar:1.21.0:compile
[INFO] com.google.appengine.tools:appengine-gcs-client:jar:0.7:compile
[INFO] joda-time:joda-time:jar:2.3:compile
[INFO] javax.transaction:transaction-api:jar:1.1:compile
[INFO] com.google.api.grpc:proto-google-common-protos:jar:1.16.0:compile
[INFO] jstl:jstl:jar:1.2:compile
[INFO] com.google.oauth-client:google-oauth-client-appengine:jar:1.30.1:compile
[INFO] com.fasterxml.jackson.core:jackson-core:jar:2.9.9:compile
[INFO] com.google.j2objc:j2objc-annotations:jar:1.3:compile
[INFO] org.codehaus.mojo:animal-sniffer-annotations:jar:1.17:compile
[INFO] io.grpc:grpc-context:jar:1.19.0:compile
[INFO] com.googlecode.json-simple:json-simple:jar:1.1.1:compile
[INFO] com.google.api:gax-httpjson:jar:0.64.1:compile
[INFO] javax.annotation:javax.annotation-api:jar:1.3.2:compile
[INFO] com.google.appengine:appengine-api-1.0-sdk:jar:1.9.76:compile
[INFO] com.google.http-client:google-http-client-jackson:jar:1.20.0:compile
[INFO] io.opencensus:opencensus-contrib-grpc-metrics:jar:0.21.0:compile
[INFO] org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] com.google.code.gson:gson:jar:2.8.5:provided
[INFO] com.google.api.grpc:proto-google-iam-v1:jar:0.12.0:compile
[INFO] com.google.auth:google-auth-library-oauth2-http:jar:0.16.2:compile
[INFO] commons-logging:commons-logging:jar:1.2:compile
[INFO] com.google.cloud:google-cloud-datastore:jar:1.84.0:compile
[INFO] com.google.errorprone:error_prone_annotations:jar:2.3.2:compile
[INFO] com.google.http-client:google-http-client:jar:1.31.0:compile
[INFO] commons-codec:commons-codec:jar:1.11:compile
[INFO] com.google.http-client:google-http-client-jackson2:jar:1.31.0:compile
[INFO] com.google.code.findbugs:jsr305:jar:3.0.2:compile
[INFO] net.spy:spymemcached:jar:2.12.3:compile
[INFO] com.google.api:api-common:jar:1.8.1:compile
[INFO] com.google.guava:guava:jar:19.0:compile
[INFO] io.opencensus:opencensus-contrib-http-util:jar:0.21.0:compile
[INFO] com.google.http-client:google-http-client-protobuf:jar:1.20.0:compile
[INFO] com.google.oauth-client:google-oauth-client-servlet:jar:1.30.1:compile
[INFO] io.opencensus:opencensus-api:jar:0.21.0:compile
[INFO] com.google.api-client:google-api-client-servlet:jar:1.30.2:compile
[INFO] com.google.apis:google-api-services-storage:jar:v1-rev108-1.22.0:compile
[INFO] com.google.api.grpc:proto-google-cloud-datastore-v1:jar:0.67.0:compile
[INFO] com.google.http-client:google-http-client-appengine:jar:1.30.1:compile
[INFO] javax.servlet.jsp:javax.servlet.jsp-api:jar:2.3.1:provided
[INFO] io.grpc:grpc-api:jar:1.21.0:compile
[INFO] com.google.oauth-client:google-oauth-client:jar:1.22.0:compile
[INFO] org.apache.httpcomponents:httpclient:jar:4.5.9:compile
[INFO] com.google.cloud:google-cloud-core:jar:1.84.0:compile
[INFO] com.google.api-client:google-api-client-appengine:jar:1.30.2:compile
[INFO] org.apache.httpcomponents:httpcore:jar:4.4.11:compile
[INFO] com.google.protobuf:protobuf-java-util:jar:3.7.1:compile
[INFO] javax.servlet:javax.servlet-api:jar:3.1.0:provided
[INFO] com.google.api:gax:jar:1.47.1:compile
[INFO] com.google.auth:google-auth-library-credentials:jar:0.16.2:compile
[INFO] com.google.android:annotations:jar:4.1.1.4:compile
[INFO] junit:junit:jar:4.12:test
[INFO] javax.jdo:jdo2-api:jar:2.3-eb:compile
[INFO] org.slf4j:slf4j-api:jar:1.7.25:compile
[INFO] javax.servlet:servlet-api:jar:2.5:compile
[INFO] com.googlecode.objectify:objectify:jar:6.0.4:compile
[INFO] org.codehaus.jackson:jackson-core-asl:jar:1.9.11:compile
[INFO] com.google.api-client:google-api-client:jar:1.22.0:compile
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 48.139 s
[INFO] Finished at: 2019-08-12T10:51:40+02:00
[INFO] ------------------------------------------------------------------------
As you can see 3.1.0 is provided, but for some reason 2.5 is the one compiled. This is my POM, it is mostly pre-compiled and I've added few dependencies:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<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">
<modelVersion>4.0.0</modelVersion>
<packaging>war</packaging>
<version>0.1.0-SNAPSHOT</version>
<groupId>examproject</groupId>
<artifactId>examproject</artifactId>
<properties>
<appengine.maven.plugin.version>2.1.0</appengine.maven.plugin.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.showDeprecation>true</maven.compiler.showDeprecation>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.google.cloud</groupId>
<artifactId>google-cloud-bom</artifactId>
<version>0.102.0-alpha</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.google.appengine.tools</groupId>
<artifactId>appengine-gcs-client</artifactId>
<version>0.7</version>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.5</version>
<scope>provided</scope>
</dependency>
<!-- Compile/runtime dependencies -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>1.9.76</version>
</dependency>
<dependency>
<groupId>com.googlecode.objectify</groupId>
<artifactId>objectify</artifactId>
<version>6.0.4</version>
</dependency>
<!-- Test Dependencies -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<!-- for hot reload of the web application -->
<outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
<plugins>
<plugin>
<groupId>com.google.cloud.tools</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>${appengine.maven.plugin.version}</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>3.0.0-M2</version>
<executions>
<execution>
<id>enforce-maven</id>
<goals>
<goal>enforce</goal>
</goals>
<configuration>
<rules>
<!-- appengine-maven-plugin requires Maven 3.5.0 -->
<requireMavenVersion>
<version>3.5.0</version>
</requireMavenVersion>
</rules>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
In order to do a couple of things (Using getPart method and something else) I need 3.1.0 servlet.
UPDATE:
If I try to delete C:\Users\Gabriel.m2\repository\javax\servlet\servlet-api, It recreates the folder after I update the project. For some reason Maven is clearly using 2.5 servlet instead of 3.1.0 and I can't understand why.

Answer 1

This is the answer of Gabriel Costache, which I copy/pasted from the question:
I manged to solve it, I'm posting what I've done if someone will ever need it.
Basically, appengine-gcs-client artifact compiles by his own servlet 2.5.
If you have a similar issue, run
mvn dependency:tree
and find from where your dependency is compiled, than add an exclusion tag just like this
<dependency>
<groupId>com.google.appengine.tools</groupId>
<artifactId>appengine-gcs-client</artifactId>
<version>0.7</version>
<exclusions>
<exclusion>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
</exclusions>
</dependency>