Support for Java 7

[Jay]

Hello,

Our team is responsible for creating different SDKs, and one of them includes creating for Java versions >= 7. When testing this using a simple Dockerfile, we ran into an issue with gradle not finding your plugin.

Do you have any insight on why this could be happening, or how can we resolve this ?

* What went wrong:
Plugin [id: 'io.franzbecker.gradle-lombok', version: '1.14'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Plugin Repositories (could not resolve plugin artifact 'io.franzbecker.gradle-lombok:io.franzbecker.gradle-lombok.gradle.plugin:1.14')
  Searched in the following repositories:
    Gradle Central Plugin Repository

[Franz Becker]

Hey there,

the error message is a bit odd. Does it work with the same configuration on JDK 8?

[Jay]

Yes, we have three builds for Java 7, 8 and 9. We are getting 100% success on 8 and 9.

Initially, we were having trouble getting gradle to download successfully as well from its wrapper, causing below error:

Exception in thread "main" javax.net.ssl.SSLException: java.security.ProviderException: java.security.InvalidKeyException: EC parameters error
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1914)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1872)
	at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1855)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1376)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1353)
	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1366)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
	at org.gradle.wrapper.Download.downloadInternal(Download.java:66)
	at org.gradle.wrapper.Download.download(Download.java:51)
	at org.gradle.wrapper.Install$1.call(Install.java:62)
	at org.gradle.wrapper.Install$1.call(Install.java:48)
	at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:69)
	at org.gradle.wrapper.Install.createDist(Install.java:48)
	at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:107)
	at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Caused by: java.security.ProviderException: java.security.InvalidKeyException: EC parameters error
	at sun.security.pkcs11.P11Key$P11ECPublicKey.getEncodedInternal(P11Key.java:1024)
	at sun.security.pkcs11.P11Key.equals(P11Key.java:158)
	at java.util.ArrayList.indexOf(ArrayList.java:303)
	at java.util.ArrayList.contains(ArrayList.java:286)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:249)
	at sun.security.validator.Validator.validate(Validator.java:260)
	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1559)
	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:213)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:987)
	at sun.security.ssl.Handshaker.process_record(Handshaker.java:923)
	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1033)
	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1342)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1369)
	... 13 more
Caused by: java.security.InvalidKeyException: EC parameters error
	at sun.security.ec.ECParameters.getAlgorithmParameters(ECParameters.java:284)
	at sun.security.ec.ECPublicKeyImpl.<init>(ECPublicKeyImpl.java:59)
	at sun.security.pkcs11.P11Key$P11ECPublicKey.getEncodedInternal(P11Key.java:1021)
	... 28 more
Caused by: java.security.NoSuchProviderException: no such provider: SunEC
	at sun.security.jca.GetInstance.getService(GetInstance.java:83)
	at sun.security.jca.GetInstance.getInstance(GetInstance.java:206)
	at java.security.Security.getImpl(Security.java:697)
	at java.security.AlgorithmParameters.getInstance(AlgorithmParameters.java:199)
	at sun.security.ec.ECParameters.getAlgorithmParameters(ECParameters.java:279)
	... 30 more
rake aborted!

We solved this issue by installing that globally via wget and adding it to classpath in our docker image. But then it got stuck here.

[Franz Becker]

There seems to be a problem with your Docker image / JDK. If Gradle won't download using the wrapper there might be an underlying problem with your JDK which should be fixed first. Installing it globally via wget seems like a workaround.

Which Java version are you using? A quick Google search revealed that there are versions affected by the exception you described (docker-library/openjdk#117).

I've confirmed that the plugin works as expected using Java 7, see this Travis log: https://travis-ci.org/franzbecker/gradle-lombok-example/builds/376495799