Introduction

NoSuchMethodError in Java usually means your code compiled against one library version but runs with another. With Apache POI 5.2.4, this commonly appears when an older commons-io jar is present at runtime. The fix is dependency alignment, not source code changes.

Why This Error Happens

The JVM resolves method calls at runtime. If bytecode expects UnsynchronizedByteArrayOutputStream.builder but the loaded commons-io class does not include it, the JVM throws NoSuchMethodError.

This situation usually comes from transitive dependency conflicts. One dependency pulls a newer commons-io, another pulls an older one, and build resolution picks the wrong artifact for runtime.

Diagnose the Actual Classpath

Start by printing the dependency tree and locating every commons-io entry.

1# Maven
2mvn -q dependency:tree -Dincludes=commons-io:commons-io
3
4# Gradle
5./gradlew dependencyInsight --dependency commons-io --configuration runtimeClasspath

If runtime classpath resolves to an older version than expected by POI, you found the root cause.

Maven Fix with Explicit Version Control

Pin commons-io to a compatible version in dependencyManagement, then keep POI dependencies explicit. This prevents accidental downgrade by other transitive dependencies.

1<project>
2  <dependencyManagement>
3    <dependencies>
4      <dependency>
5        <groupId>commons-io</groupId>
6        <artifactId>commons-io</artifactId>
7        <version>2.13.0</version>
8      </dependency>
9    </dependencies>
10  </dependencyManagement>
11
12  <dependencies>
13    <dependency>
14      <groupId>org.apache.poi</groupId>
15      <artifactId>poi-ooxml</artifactId>
16      <version>5.2.4</version>
17    </dependency>
18  </dependencies>
19</project>

Then run a clean build so stale jars are not reused.

mvn clean test

Gradle Fix with Resolution Strategy

For Gradle projects, force a compatible commons-io during runtime classpath resolution.

1plugins {
2    id 'java'
3}
4
5repositories {
6    mavenCentral()
7}
8
9dependencies {
10    implementation 'org.apache.poi:poi-ooxml:5.2.4'
11}
12
13configurations.all {
14    resolutionStrategy {
15        force 'commons-io:commons-io:2.13.0'
16    }
17}

After applying, check the effective runtime classpath again with dependencyInsight.

Exclude Conflicting Transitive Dependencies

Some enterprise projects include older utility bundles that pull commons-io transitively. In that case, pinning alone may still leave duplicate jars in fat artifacts. Add targeted exclusions on the dependency that introduces the outdated version, then verify only one commons-io jar remains at runtime.

1<dependency>
2  <groupId>com.example</groupId>
3  <artifactId>legacy-exporter</artifactId>
4  <version>4.1.0</version>
5  <exclusions>
6    <exclusion>
7      <groupId>commons-io</groupId>
8      <artifactId>commons-io</artifactId>
9    </exclusion>
10  </exclusions>
11</dependency>

For Spring Boot jars, inspect packaged contents to confirm the final artifact is clean.

jar tf target/app.jar | grep 'commons-io'

Preventing Future Classpath Drift

Use one source of truth for dependency versions. In Maven, use a parent or version catalog style management. In Gradle, use version catalogs or platform constraints.

Also add a startup check in integration tests to print loaded package versions for key libraries. Detecting mismatch during CI is much cheaper than runtime production failure.

Package p = org.apache.commons.io.IOUtils.class.getPackage();
System.out.println("commons-io version: " + p.getImplementationVersion());

Common Pitfalls

A common mistake is updating only POI and assuming transitive dependencies will align automatically. Existing constraints in your project can still force old commons-io versions.

Another issue is fixing compile classpath but not runtime classpath. Tests may pass in one module and fail in packaged deployment because the final artifact contains a different jar set.

Shaded jars can also hide the real source of conflict. If your build process shades dependencies, inspect the shaded artifact contents and relocation rules.

Finally, remember that NoSuchMethodError is binary compatibility failure. Catching the exception at runtime does not solve the underlying mismatch. Resolve dependency versions instead.

Document approved library versions in your team runbook to keep upgrades consistent.

Summary

• NoSuchMethodError indicates runtime and compile dependency mismatch
• POI 5.2.4 failures often involve conflicting commons-io versions
• Use dependency tree tools to verify actual runtime resolution
• Pin compatible versions with Maven or Gradle dependency controls
• Add CI checks to catch classpath drift before deployment