Develop Reference

Integrate New Relic with Spring Boot using Micrometer

I am trying to integrate a simple Spring Boot Application with New Relic using Micrometer.
Here are the configurations details:-
application.properties
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always
management.metrics.export.newrelic.enabled=true
management.metrics.export.newrelic.api-key:MY_API_KEY // Have added the API key here
management.metrics.export.newrelic.account-id: MY_ACCOUNT_ID // Have added the account id here
logging.level.io.micrometer.newrelic=TRACE
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.5</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>springboot.micrometer.demo</groupId>
<artifactId>micrometer-new-relic</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>micrometer-new-relic</name>
<description>Demo project for actuator integration with new relic using micrometer</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-registry-new-relic</artifactId>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-registry-prometheus</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
I was able to integrate Prometheus with this application using micrometer-registry-prometheus dependency. I had set up Prometheus to run in a Docker container in my local system. I used the following set of commands-
docker pull prom/prometheus
docker run -p 9090:9090 -v D:/Workspaces/STS/server_sent_events_blog/micrometer-new-relic/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus
prometheus.yml
global:
scrape_interval: 4s
evaluation_interval: 4s
scrape_configs:
- job_name: 'spring_micrometer'
metrics_path: '/actuator/prometheus'
scrape_interval: 5s
static_configs:
- targets: ['my_ip_address:8080']
When I navigated to localhost:9090/targets I can see that Prometheus dashboard shows my application details and that it can scrape data from it. And in the dashboard, I can see my custom metrics as well along with other metrics.
So my question is I want to achieve the same thing using New Relic. I have added the micrometer-registry-new-relic pom dependency. I have shared the application.properties file as well. I can see logs in my console saying it is sending data to New Relic-
2021-10-24 12:42:04.889 DEBUG 2672 --- [trics-publisher] i.m.n.NewRelicInsightsApiClientProvider : successfully sent 58 metrics to New Relic.
Questions:
What are the next steps?
Do I need a local running server of New Relic as I did for Prometheus?
Where can I visualize this data? I have an account in New Relic, I see nothing there
https://discuss.newrelic.com/t/integrate-spring-boot-actuator-with-new-relic/126732
As per the above link, Spring Bootctuator pushes metric as an event type “SpringBootSample”.
With NRQL query we can confirm this-
FROM SpringBootSample SELECT max(value) TIMESERIES 1 minute WHERE metricName = 'jvmMemoryCommitted'
What does the result of this query indicate? Is it a metric related to my application?
Here is the GitHub link to the demo that I have shared here.
I did not find any clear instructions on this, there are some examples out there but that uses Java agent.
Any kind of help will be highly appreciated.

From what I have learned so far.
There are 3 ways to integrate New Relic with a Spring Boot Application-
Using the Java Agent provided by New Relic
Using New Relic's Micrometer Dependency
Micormeter's New Relic Dependency
1. Configuration using Java Agent Provided By New Relic
Download the Java Agent from this URL- https://docs.newrelic.com/docs/release-notes/agent-release-notes/java-release-notes/
Extract it.
Modify the newrelic.yml file inside the extracted folder to inlcude your
license_key:
app_name:
Create a SpringBoot application with some REST endpoints.
Build the application.
Navigate to the root path where you have extracted the newrelic java agent.
Enter this command
java -javagent:<path to your new relic jar>\newrelic.jar -jar <path to your application jar>\<you rapplication jar name>.jar
To view the application metrics-
Log in to your New Relic account.
Go to Explorer Tab.
Click on Services-APM
You can see the name of your application(which you had mentioned in the newrelic.yml file) listed there.
Click on the application name.
The dashboard should look something like this.
Using New Relic's Micrometer Dependency is the preferred way to do it.
2. Configuration using New Relic's Micrometer Dependency
Add this dependency
<dependency>
<groupId>com.newrelic.telemetry</groupId>
<artifactId>micrometer-registry-new-relic</artifactId>
<version>0.7.0</version>
</dependency>
Modify the MicrometerConfig.java class to add your API Key and Application name.
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.springframework.boot.actuate.autoconfigure.metrics.CompositeMeterRegistryAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleMetricsExportAutoConfiguration;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.newrelic.telemetry.Attributes;
import com.newrelic.telemetry.micrometer.NewRelicRegistry;
import com.newrelic.telemetry.micrometer.NewRelicRegistryConfig;
import java.time.Duration;
import io.micrometer.core.instrument.config.MeterFilter;
import io.micrometer.core.instrument.util.NamedThreadFactory;
#Configuration
#AutoConfigureBefore({ CompositeMeterRegistryAutoConfiguration.class, SimpleMetricsExportAutoConfiguration.class })
#AutoConfigureAfter(MetricsAutoConfiguration.class)
#ConditionalOnClass(NewRelicRegistry.class)
public class MicrometerConfig {
#Bean
public NewRelicRegistryConfig newRelicConfig() {
return new NewRelicRegistryConfig() {
#Override
public String get(String key) {
return null;
}
#Override
public String apiKey() {
return "your_api_key"; // for production purposes take it from config file
}
#Override
public Duration step() {
return Duration.ofSeconds(5);
}
#Override
public String serviceName() {
return "your_service_name"; // take it from config file
}
};
}
#Bean
public NewRelicRegistry newRelicMeterRegistry(NewRelicRegistryConfig config) throws UnknownHostException {
NewRelicRegistry newRelicRegistry = NewRelicRegistry.builder(config)
.commonAttributes(new Attributes().put("host", InetAddress.getLocalHost().getHostName())).build();
newRelicRegistry.config().meterFilter(MeterFilter.ignoreTags("plz_ignore_me"));
newRelicRegistry.config().meterFilter(MeterFilter.denyNameStartsWith("jvm.threads"));
newRelicRegistry.start(new NamedThreadFactory("newrelic.micrometer.registry"));
return newRelicRegistry;
}
}
Run the application.
To view the Application metrics-
Log in to your New Relic account.
Go to Explorer Tab.
Click on Services-OpenTelemetry
You can see the name of your application(which you had mentioned in the MicrometerConfig file) listed there.
Click on the application name.
The dashboard should look something like this.

What are the next steps?
It seems you are done and successfully shipped metrics to NewRelic.
Do I need a local running server of New Relic as I did for Prometheus?
No, NewRelic is a SaaS offering.
Where can I visualize this data? I have an account in New Relic, I see nothing there
It seems you already found it (screenshot).
What does the result of this query indicate? Is it a metric related to my application?
From the screenshot, I can't tell if it is your application but this seems to be the jvm.memory.committed metric pushed by a Spring Boot app (so likely).
In order to see if this is your app or not, you can add common tags which can tell the name of the app and some kind of an instance ID (or hostname?) in case you have multiple instances from the same app, see:
Spring Boot Docs (I would do this)
Micrometer Docs (do this if you don't use Spring Boot or want to do something tricky)
Real-World Example

My JUnit tests don't work when I execute them via maven

I use Maven on my test project and I wanted to test test option in Maven's lifecycle, but my JUnit test failed. I have a class named Arithmetics in src.main.java package and a class named ArithmeticsTest in src.test.java package.
When I run ArithmeticsTest on my own using IntelliJ IDEA everything works OK, and I have expected java.lang.AssertionError, so why I don't have such when I run test option in maven?
Console output:
T E S T S
Results :
Tests run: 0, Failures: 0, Errors: 0, Skipped: 0
src.main.java.Arithmetics.java
public class Arithmetics
{
public static int add(int a, int b)
{
return a + b;
}
}
src.test.java.ArithmeticsTest.java
import org.junit.jupiter.api.RepeatedTest;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
public class ArithmeticsTest
{
#Test
public void testAdd()
{
assertEquals(4, Arithmetics.add(2, 3));
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>
<groupId>groupId</groupId>
<artifactId>Test</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>15</maven.compiler.source>
<maven.compiler.target>15</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency>
</dependencies>
</project>

There are three wrong things I can spot based on your question, while they might not provide a complete answer I hope they'll will be a step in a right direction:
src/main/java and src/test/java is not a package as you write. Its a folder layout supported by maven, basically , if you have a code in com.myorg.somepackage.Arithmetics
Make sure you have the following layout at the level of actual physical folders:
src
main
java
com
myorg
somepackage
Arithmetics.java
test
java
com
myorg
somepackage
ArithmeticsTest.java
For both java files the package must be com.myorg.somepackage:
package com.myorg.somepackage;
public class Arithmetics {}
And
package com.myorg.somepackage;
public class ArithmeticsTest {}
I know it might be a wrong naming that you've used in the question, but still I have to state it because it might cause an actual issue
The second issue is that for some reason you seem to configure your surefire plugin to use test ng which is an alternative to junit. It can happen because testng is placed as a dependency - I can only speculate because you don't really show the full surefire plugin configure and do not provide a full list of dependencies, but you've got and idea I believe :)
This is wrong because you use the junit5 dependencies as well as the imports that correspond to the junit 5.
The dependencies on the junit 5 are completely messy:
You seem to have two dependencies on just the same with the different scope, its really a wrong thing to do. Make sure you use only the test scope and have all the relevant dependencies. Read here for instruction of how to configure the surefire plugin
In addition, for the sake of completeness of the answer, check that you use the recent version of surefire plugin, if its too old the chances are that it won't be able to run jupiter engine (junit 5)

As other answer already pointed out few things which may go wrong in your case, I am just adding the solution to your pom xml.
The surefire plugin version is the main culprit. Default with maven (2.12.4) will not work with junit-5 jupiter engine.
So just add the plugin in your with version 2.22.1 in your pom, it should work after that, assuming your folder structure as per required (see other answer).
<build>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
</plugins>
</pluginManagement>
</build>

"not all expectations were satisfied" missing under Eclipse

We use two different IDEs, Netbeans 8.2 and Eclipse 4.7.2. We are running JMock 2.8.3 with JUnit 4.11 and have a test that fails under Netbeans and Jenkins (using the Netbean's Ant scripts), but passes under Eclipse.
The error is "not all expectations were satisfied".
However, if I add an assertIsSatisfied() call to the end of the test, it will fail with the correct error message under Eclipse.
I can reproduce this with a trivial example:
public class FailureExample {
private static class Example {
public void doSomething() { }
public void doSomethingElse() { }
}
// Mocks
#Rule public JUnitRuleMockery context = new JUnitRuleMockery(){{
setThreadingPolicy(new Synchroniser());
setImposteriser(ClassImposteriser.INSTANCE);
}};
public Example instance;
#Before
public void setUp() throws Exception {
// Mocks
instance = context.mock(Example.class);
}
#Test
public void testExample() {
context.checking(new Expectations() {{
oneOf(instance).doSomething();
oneOf(instance).doSomethingElse();
}});
instance.doSomething();
}
}
Is there something else I need to do in Eclipse to make JMock behave as expected?
Update
Adding screenshot of our project's libraries:
UPDATE
I tried create a new Java project as well as a new Maven project (as described below by Till Brychcy) as those worked. I tried removing all the jar files listed for my project and then readding them, but it failed.
I'm very close to abandoning Eclipse in favor of Netbeans, simply because I have real work to do, not just fighting with Eclipse.

I cannot reproduce your problem.
With both Eclipse 4.7.2 and Eclipse built from the current master I get:
java.lang.AssertionError: not all expectations were satisfied
expectations:
expected once, already invoked 1 time: example.doSomething()
! expected once, never invoked: example.doSomethingElse()
what happened before this:
example.doSomething()
I used the following pom.xml:
<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>
<groupId>test</groupId>
<artifactId>jmockbug</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>jmockbug</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.jmock</groupId>
<artifactId>jmock</artifactId>
<version>2.8.3</version>
</dependency>
<dependency>
<groupId>org.jmock</groupId>
<artifactId>jmock-junit4</artifactId>
<version>2.8.3</version>
</dependency>
<dependency>
<groupId>org.jmock</groupId>
<artifactId>jmock-legacy</artifactId>
<version>2.8.3</version>
</dependency>
</dependencies>

Running jar built using Maven causes "java.lang.NoClassDefFoundError: org/rosuda/JRI/Rengine" error

I am trying to build a JAR library that can invoke R code.
I basically want this jar to be capable enough to be able to run on any machine that has support for running jar executables(No need of seperate R software).
For this I am using Maven. I am able to compile and create a jar without any errors. However, when I run it, I am unable to yield successful results.
This is my java code
package com.company.analytics.timeseries;
import org.rosuda.JRI.REXP;
import org.rosuda.JRI.Rengine;
public class App {
public static void main(String[] args) {
System.out.println("Creating Rengine (with arguments)");
String[] Rargs = { "--vanilla" };
Rengine re = new Rengine(Rargs, false, null);
System.out.println("Rengine created, waiting for R");
if (!re.waitForR()) {
System.out.println("Cannot load R");
return;
}
System.out.println("Done.");
}
}
This is my pom.xml file
<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>
<groupId>com.company.analytics</groupId>
<artifactId>timeseries</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>timeseries</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.nuiton.thirdparty</groupId>
<artifactId>JRI</artifactId>
<version>RELEASE</version>
</dependency>
<dependency>
<groupId>org.rosuda.REngine</groupId>
<artifactId>REngine</artifactId>
<version>2.1.0</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>central</id>
<name>Maven Central</name>
<url>http://repo1.maven.org/maven2</url>
</repository>
</repositories>
</project>
I used mvn clean and then mvn package to create the jar file.
A JAR file of 4KB is created in C:\MVN\project\analytics\timeseries\target. Thern, from the command line on Windows, when I run execute this jar file, I get the following error
C:\MVN\project\analytics\timeseries\target\classes>java com.company.analytics.timeseries.App
Creating Rengine (with arguments)
Exception in thread "main" java.lang.NoClassDefFoundError: org/rosuda/JRI/Rengine
at com.company.analytics.timeseries.App.main(App.java:10)
Caused by: java.lang.ClassNotFoundException: org.rosuda.JRI.Rengine
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
I am trying to figure out what mistake am I committing. I tried to find answers by googling, but I couldn't fix it.

Since I've been smashing my head against this for a day now and I'll likely forget in the future and reference this page - per what Gergely Basco's suggests in an above comment, strictly speaking both R and rJava need to be installed on the machine in order to resolve the Cannot find JRI native library! issue when instantiating your org.rosuda.REngine.REngine object, and this cannot be done exclusively by way of adding the JRIEngine dependency in your pom.xml (bummer).
Steps (for how I'm doing it anyway for my later image):
Install Brew (I just happen to be using Brew for other dependencies)
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Install R using brew:
brew tap homebrew/science
brew install R
Install rJava with R (takes a bit of compile time, grab a coffee)
install.packages("rJava")
add rJava/jri to java.library.path classpath, add R_HOME to environment variables (where you installed R - in my case, where Brew installed it). Note that if you're trying to run this in your IDE(I'm running IDEA16), it won't inherit the path you set in ~/.bash_profile, you need to set it in your run configuration.
-Djava.library.path="/usr/local/lib/R/3.3/site-library/rJava/jri/
R_HOME=/usr/local/Cellar/r/3.3.1_2/R.framework/Resources
Ensure maven has dependency for JRIEngine in pom.xml
<dependency>
<groupId>com.github.lucarosellini.rJava</groupId>
<artifactId>JRIEngine</artifactId>
<version>0.9-7</version>
</dependency>
Instantiate REngine (I need this version in order to pass dataframe to R from java)
String[] Args = {"--vanilla"};
REngine engine = REngine.engineForClass("org.rosuda.REngine.JRI.JRIEngine", Args, new REngineStdOutput (), false);
What you should end up with looks something like this at runtime, if you instantiate with the callback argument (new REngineStdOutput () ); otherwise if you just instantiate with the String engineForClass("org.rosuda.REngine.JRI.JRIEngine"), you'll wont get the below output from R on startup/elsewise, depending on if you want it or not:
/**R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin15.5.0 (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
Natural language support but running in an English locale
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.**/
Hope this helps someone in the future and saves them from the pain.

You need to build a jar with all your dependencies included. (aka fat jar) Since you are already using Maven, the only thing you need to do is to instruct Maven to include the dependencies by adding this plugin to your pom.xml file:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.5.5</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>assemble-all</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

You are missing the classpath argument. Your jar file contains your compiled code without any 3rd party jars. When you want to run it, you should add -cp and point to all your 3rd party jars.
You can also build a single jar with all dependencies using Maven's assembly plugin.

Terracotta toolkit missing class prevents EHCache from starting

I am new to EHCache and tried to use it as our cache server. I wrote the code trying to get started:
public class CacheMap {
private static CacheManager cacheManager=new CacheManager("ehcache.xml");
private static Cache cache=cacheManager.getCache("firstCache");
}
In classpath, I have included terracotta-toolkit-1.6-5.2.0.jar, terracotta-toolkit-1.6-runtime-5.0.0, slf4j-api-1.6.6, slf4j-jdk14-1.6.6, ehcache-2.7.0 and ehcache-ee-2.7.0
And I have ehcache.xml in my root directory.
However, I have got the following error on first line of my code:
Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: net.sf.ehcache.CacheException: Could not create ClusteredInstanceFactory due to missing class. Please verify that terracotta-toolkit is in your classpath.
at net.sf.ehcache.terracotta.TerracottaClusteredInstanceHelper.newClusteredInstanceFactory(TerracottaClusteredInstanceHelper.java:187)
at net.sf.ehcache.terracotta.TerracottaClient.createNewClusteredInstanceFactory(TerracottaClient.java:169)
at net.sf.ehcache.terracotta.TerracottaClient.createClusteredInstanceFactory(TerracottaClient.java:126)
at net.sf.ehcache.CacheManager.doInit(CacheManager.java:442)
at net.sf.ehcache.CacheManager.init(CacheManager.java:392)
at net.sf.ehcache.CacheManager.<init>(CacheManager.java:291)
at CacheMap.<clinit>(CacheMap.java:7)
Any ideas how to get Terracotta working?

I think you have mixed required terracotta jars. If you use maven here are the dependencies for terracotta ver. 3.6.5 (the last version compatible with JDK5):
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-core-ee</artifactId>
<version>2.5.6</version>
</dependency>
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-terracotta-ee</artifactId>
<version>2.5.6</version>
</dependency>
<dependency>
<groupId>org.terracotta</groupId>
<artifactId>terracotta-toolkit-1.5-runtime-ee</artifactId>
<version>4.5.0</version>
</dependency>
Also don't forget to point to terracotta's maven repository to download required jars:
<repository>
<id>terracotta-repository</id>
<url>http://www.terracotta.org/download/reflector/releases</url>
<releases>
<enabled>true</enabled>
</releases>
</repository>
If you are not using maven, then you should have on your classpath the following jars:
ehcache-core-ee-2.5.6.jar
ehcache-terracotta-ee-2.5.6.jar
terracotta-toolkit-1.5-runtime-ee-4.5.0.jar