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  1. ,
    via Stack Overflow by carlos

    Set the mail.smtp.ssl.trust system property to an smtp host, like smtp.gmail.com.

  2. ,
    Expert tip

    If you're using wiremock, configure your code to accept wiremock self-signed certificate or create a keystore and certificate that are trusted by your HTTP client and configure wiremock to use that

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via eclipse-cs by blueradiobutton
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sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
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Could not find /PROJECT_NAME/build-tools/src/main/resources/PACKAGE/PATH/checkstyle.xml
via eclipse-cs by martin_cy
, 1 year ago
Failed to write checkstyle plugin configuration file:\ngnu.xml.transform.TransformerFactoryImpl cannot be cast to javax.xml.transform.sax.SAXTransformerFactory
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)	at java.security.cert.CertPathBuilder.build(Unknown Source)	at sun.security.validator.PKIXValidator.doBuild(Unknown Source)	at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)	at sun.security.validator.Validator.validate(Unknown Source)	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(Unknown Source)	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Unknown Source)	at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)	at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)	at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)	at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)	at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)	at com.atlassw.tools.eclipse.checkstyle.config.configtypes.RemoteConfigurationType.getBytesFromURLConnection(RemoteConfigurationType.java:353)	at com.atlassw.tools.eclipse.checkstyle.config.configtypes.RemoteConfigurationType.getCheckstyleConfiguration(RemoteConfigurationType.java:119)	at com.atlassw.tools.eclipse.checkstyle.config.CheckConfigurationWorkingCopy.getCheckstyleConfiguration(CheckConfigurationWorkingCopy.java:420)	at com.atlassw.tools.eclipse.checkstyle.config.CheckConfigurationWorkingCopy.setLocation(CheckConfigurationWorkingCopy.java:208)	at com.atlassw.tools.eclipse.checkstyle.config.configtypes.RemoteConfigurationEditor.getEditedWorkingCopy(RemoteConfigurationEditor.java:260)	at com.atlassw.tools.eclipse.checkstyle.config.gui.CheckConfigurationPropertiesDialog.okPressed(CheckConfigurationPropertiesDialog.java:337)	at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:472)	at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)	at org.eclipse.jface.window.Window.open(Window.java:801)	at com.atlassw.tools.eclipse.checkstyle.config.gui.CheckConfigurationWorkingSetEditor.addCheckConfig(CheckConfigurationWorkingSetEditor.java:495)	at com.atlassw.tools.eclipse.checkstyle.config.gui.CheckConfigurationWorkingSetEditor.access$300(CheckConfigurationWorkingSetEditor.java:79)	at com.atlassw.tools.eclipse.checkstyle.config.gui.CheckConfigurationWorkingSetEditor$PageController.widgetSelected(CheckConfigurationWorkingSetEditor.java:396)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)	at org.eclipse.jface.window.Window.open(Window.java:801)	at org.eclipse.ui.internal.OpenPreferencesAction.run(OpenPreferencesAction.java:65)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:583)	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:500)	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)	at org.eclipse.equinox.launcher.Main.run(Main.java:1236)