# Xpack on Elasticsearch 5.5 **URL:** \ **Category:** Elasticsearch\ **Created:** [July 14, 2017, 12:19am UTC](https://discuss.elastic.co/t/xpack-on-elasticsearch-5-5/93092 "2017-07-14T00:19:18Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![chandu507.m](https://avatars.discourse-cdn.com/v4/letter/c/45deac/32.png) [@chandu507.m](https://discuss.elastic.co/u/chandu507.m)\ **Post date:** [July 14, 2017, 12:19am UTC](https://discuss.elastic.co/t/xpack-on-elasticsearch-5-5/93092/1 "2017-07-14T00:19:18Z")
Hello, I am trying to install xpack for elasticsearch 5,5 version in LINUX machine. I am facing the below listed exception.PFB: -bash-4.2$ bin/elasticsearch-plugin install x-pack --batch Exception in thread "main" javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 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:1514) at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216) at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1026) at sun.security.ssl.Handshaker.process\_record(Handshaker.java:961) 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.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:153) at org.elasticsearch.plugins.InstallPluginCommand.urlExists(InstallPluginCommand.java:300) at org.elasticsearch.plugins.InstallPluginCommand.getElasticUrl(InstallPluginCommand.java:267) at org.elasticsearch.plugins.InstallPluginCommand.download(InstallPluginCommand.java:223) at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:215) at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:201) at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:69) at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) at org.elasticsearch.cli.Command.main(Command.java:88) at org.elasticsearch.plugins.PluginCli.main(PluginCli.java:47) Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387) at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292) 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:1496) ... 21 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141) at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126) at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382) ... 27 more Please share your suggestions .... ---
**Author:** ![LeeDr](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/leedr/32/9289_2.png) [@LeeDr](https://discuss.elastic.co/u/LeeDr)\ **Post date:** [July 17, 2017, 8:50pm UTC](https://discuss.elastic.co/t/xpack-on-elasticsearch-5-5/93092/2 "2017-07-17T20:50:06Z")
Hi Chandra, Is there a proxy or anything that could be blocking the plugin installer from getting to it? The easiest thing I can suggest is to see if you can download the x-pack.zip file from that machine and do the offline install. `wget https://artifacts.elastic.co/downloads/packs/x-pack/x-pack-5.5.0.zip` `bin/elasticsearch-plugin install file:////x-pack-5.5.0.zip` Note that the zip file URL above is for the combined X-Pack zip which can be used to install X-Pack on Elasticsearch, Logstash, and Kibana. Please let us know if that works OK. Regards, Lee ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 14, 2017, 8:50pm UTC](https://discuss.elastic.co/t/xpack-on-elasticsearch-5-5/93092/3 "2017-08-14T20:50:23Z")
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