I can't tell from this stack trace what exactly you're doing, but normally such a thing would only happen while checking for updates.   Is that what you were doing?  Controlling what's in Window -> Preferences -> Install/Update -> Available Software Sites should help eliminate the offensive update site.

On 12.11.2017 12:34, Timothy Vogel wrote:
Ed,
  Thanks for your suggestion.  I updated the Java version to the latest 1.8 update and still receive the same error.

  Any ideas why an rcp installation would reference a p2.index file?   Is there any way to "clean out" a specific reference to that file from an existing rcp installation?
Timothy

From: Ed Merks
Sent: Sunday, November 5, 05:00
Subject: Re: [p2-dev] RCP update failing
To: p2-dev@eclipse.org


Timothy,
Based on past experience, this problem will likely go away if you update your version of Java which will update Java the root certificates.

On 05.11.2017 05:40, Timothy Vogel wrote:
An update site that has been working is now failing with the exception below.  It is trying to read p2.index.  This file does not exist in the composite repo nor the product repo.  I created one with minimal contents and receive the same error.

Any suggestions on how to debug?
Thanks
Timothy

20171105 00:15:08.536 11548  ERROR com.easa.acmotor.base.BusinessStatusHandler - uncaught exception: org.eclipse.equinox.p2.transport.ecf : Connection to http://www.xxx.com/sites/motordb_update/repository/ <https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.xxx.com%2Fsites%2Fmotordb_update%2Frepository%2Fp2.index&data=02%7C01%7CTVogel%40msn.com%7C41fd6b6ad7d742ad750908d5243402df%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636454728162685505&sdata=YT4L8kjCZLW41inK6VGqJLgCkDZyZ5LPbxBE7SUTQpw%3D&reserved=0>p2 <https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.xxx.com%2Fsites%2Fmotordb_update%2Frepository%2Fp2.index&data=02%7C01%7CTVogel%40msn.com%7C41fd6b6ad7d742ad750908d5243402df%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636454728162685505&sdata=YT4L8kjCZLW41inK6VGqJLgCkDZyZ5LPbxBE7SUTQpw%3D&reserved=0>.index <https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.xxx.com%2Fsites%2Fmotordb_update%2Frepository%2Fp2.index&data=02%7C01%7CTVogel%40msn.com%7C41fd6b6ad7d742ad750908d5243402df%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636454728162685505&sdata=YT4L8kjCZLW41inK6VGqJLgCkDZyZ5LPbxBE7SUTQpw%3D&reserved=0> failed on sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target. Retry attempt 0 started 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(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.Handshaker.fatalSE(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.Handshaker.fatalSE(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.Handshaker.processLoop(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.Handshaker.process_record(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.SSLSocketImpl.writeRecord(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.AppOutputStream.write(Unknown Source) ~[na:1.8.0_60]                 at org.apache.http.impl.io.AbstractSessionOutputBuffer.flushBuffer(AbstractSessionOutputBuffer.java:159) ~[na:na]                 at org.apache.http.impl.io.AbstractSessionOutputBuffer.flush(AbstractSessionOutputBuffer.java:166) ~[na:na]                 at org.apache.http.impl.AbstractHttpClientConnection.doFlush(AbstractHttpClientConnection.java:272) ~[na:na]                 at org.apache.http.impl.AbstractHttpClientConnection.flush(AbstractHttpClientConnection.java:277) ~[na:na]                 at org.apache.http.impl.conn.AbstractClientConnAdapter.flush(AbstractClientConnAdapter.java:201) ~[na:na]                 at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:239) ~[na:na]                 at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121) ~[na:na]                 at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:685) ~[na:na]                 at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:487) ~[na:na]                 at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863) ~[na:na]                 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[na:na]                 at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1084) ~[na:na]                 at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer.access$0(HttpClientRetrieveFileTransfer.java:1075) ~[na:na]                 at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientRetrieveFileTransfer$1.performFileTransfer(HttpClientRetrieveFileTransfer.java:1071) ~[na:na]                 at org.eclipse.ecf.filetransfer.FileTransferJob.run(FileTransferJob.java:74) ~[na:na]                 at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) ~[na:na] 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(Unknown Source) ~[na:1.8.0_60]                 at sun.security.validator.PKIXValidator.engineValidate(Unknown Source) ~[na:1.8.0_60]                 at sun.security.validator.Validator.validate(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source) ~[na:1.8.0_60]                 at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source) ~[na:1.8.0_60]
                ... 24 common frames omitted
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target                 at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source) ~[na:1.8.0_60]                 at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source) ~[na:1.8.0_60]                 at java.security.cert.CertPathBuilder.build(Unknown Source) ~[na:1.8.0_60]
                ... 30 common frames omitted


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