The gradle and tomcat snaps also fail, and it seems it's the same issue and people recommend not to use openjdk in arm.

(classic)elopio@localhost:~/snapcraft/demos/gradle$ ./gradlew --debug jar                                                                                                                          [42/1230]
Downloading https://services.gradle.org/distributions/gradle-2.14-bin.zip
                       
Exception in thread "main" javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: signature check faile
d                  
        at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
        at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
        at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
        at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
        at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
        at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
        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.followRedirect0(HttpURLConnection.java:2701)
        at sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2623)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1806)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
        at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
        at org.gradle.wrapper.Download.download(Download.java:44)
        at org.gradle.wrapper.Install$1.call(Install.java:61)                            
        at org.gradle.wrapper.Install$1.call(Install.java:48)
        at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
        at org.gradle.wrapper.Install.createDist(Install.java:48)
        at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
        at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Caused by: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: signature check failed
        at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:352)                                                                                                                     
        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:324)                                                                                                          
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)                                                                                             
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)                                                                                              
        at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)                                                                                                       
        ... 22 more                                                                                                                                                             
Caused by: java.security.cert.CertPathValidatorException: signature check failed
        at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:135)
        at sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:219)
        at sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:140)
        at sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(PKIXCertPathValidator.java:79)
        at java.security.cert.CertPathValidator.validate(CertPathValidator.java:292)
        at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:347)
        ... 28 more
Caused by: java.security.SignatureException: Signature does not match.
        at sun.security.x509.X509CertImpl.verify(X509CertImpl.java:449)
        at sun.security.provider.certpath.BasicChecker.verifySignature(BasicChecker.java:166)
        at sun.security.provider.certpath.BasicChecker.check(BasicChecker.java:147)
        at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:125)
        ... 33 more