Corrupt database

Hi,

we're experiencing a strange problem, after upgrading Youtrack from 2017.2.x  (worked flawlessly) to 2018.2.x sometimes Youtrack stops working and after attempting to restart it it complains about the database being ciphered (see below). It has happened three times now and after that we manually restore it from previous day's backups.

Do you know what could cause this ? Perhaps heavy CPU loads during nightly backups of the server  ?

We want the application to perform flawlessly as it did before so we'll create a brand new installation using a Docker image. But if we did something wrong we'd like to know to avoid it in the future.

thanks,Rok

[2018-07-25 08:00:01,133] [YouTrack Error] [2018-07-25 08:00:01,126]   WARN - pse.jetty.webapp.WebAppContext - Failed startup of context o.e.j.w.WebAppContext@3df7711f{/hub,file:///root/.youtrack/app/apps/hub/web/,UNAVAILABLE}
[2018-07-25 08:00:01,133] [YouTrack Error] jetbrains.exodus.crypto.InvalidCipherParametersException: Database is ciphered with different/unknown cipher parameters
[2018-07-25 08:00:01,133] [YouTrack Error]      at jetbrains.exodus.log.Log.<init>(Log.java:163) ~[?:?]
[2018-07-25 08:00:01,134] [YouTrack Error]      at jetbrains.exodus.env.Environments.newLogInstance(Environments.java:137) ~[?:?]
[2018-07-25 08:00:01,134] [YouTrack Error]      at jetbrains.exodus.env.Environments.newLogInstance(Environments.java:115) ~[?:?]
[2018-07-25 08:00:01,134] [YouTrack Error]      at jetbrains.exodus.env.Environments.newLogInstance(Environments.java:104) ~[?:?]
[2018-07-25 08:00:01,134] [YouTrack Error]      at jetbrains.jetpass.server.main.EnvironmentFactory.createEnvironment(EnvironmentFactory.kt:50) ~[?:?]
[2018-07-25 08:00:01,134] [YouTrack Error]      at jetbrains.hub.server.listener.MigrationServletContextListener.contextInitialized(MigrationServletContextListener.kt:15) ~[?:?]
[2018-07-25 08:00:01,134] [YouTrack Error]      at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:843) ~[jetty-server-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,134] [YouTrack Error]      at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:533) ~[jetty-servlet-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,134] [YouTrack Error]      at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:816) ~[jetty-server-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,135] [YouTrack Error]      at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:345) ~[jetty-servlet-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,135] [YouTrack Error]      at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1406) ~[jetty-webapp-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,135] [YouTrack Error]      at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1368) ~[jetty-webapp-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,135] [YouTrack Error]      at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:778) ~[jetty-server-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,136] [YouTrack Error]      at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:262) ~[jetty-servlet-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,136] [YouTrack Error]      at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:522) [jetty-webapp-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,136] [YouTrack Error]      at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) [jetty-util-9.3.20.v20170531.jar:9.3.20.v20170531]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.services.impl.jetty.BundleJettyServicesContainer.startContextInContainer(BundleJettyServicesContainer.java:92) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.services.impl.jetty.BundleJettyServicesContainer.startServiceInContainer(BundleJettyServicesContainer.java:74) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.services.impl.BundledService.doStart(BundledService.java:55) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.services.impl.ServiceBase.start(ServiceBase.java:65) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.Services.startService(Services.java:627) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.Services.startAllServices(Services.java:554) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.Services.start(Services.java:534) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.BundleMain.start(BundleMain.java:208) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.BundleMain.start(BundleMain.java:167) [bundle-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_162]
[2018-07-25 08:00:01,136] [YouTrack Error]      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_162]
[2018-07-25 08:00:01,136] [YouTrack Error]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_162]
[2018-07-25 08:00:01,136] [YouTrack Error]      at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_162]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.bundle.bootstrap.Bundle$EntryPointProvider$1.invoke(Bundle.java:92) [bundle-bootstrap-1.4.181.jar:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.sun.proxy.$Proxy18.start(Unknown Source) [?:?]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.launcher.AppProxy$6$1.call(AppProxy.java:99) [youtrack-wrapper.jar:1.0.117]
[2018-07-25 08:00:01,136] [YouTrack Error]      at com.jetbrains.launcher.AppProxy$6$1.call(AppProxy.java:97) [youtrack-wrapper.jar:1.0.117]
[2018-07-25 08:00:01,136] [YouTrack Error]      at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_162]
[2018-07-25 08:00:01,136] [YouTrack Error]      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_162]