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javax.servlet.ServletException: vcat.VCatException: Error reading Wikimedia Toolforge meta information for dbname 'frwiki'

javax.servlet.ServletException: javax.servlet.ServletException: vcat.VCatException: Error reading Wikimedia Toolforge meta information for dbname 'frwiki'
	at vcat.webapp.base.AbstractVCatServlet.doRequest(AbstractVCatServlet.java:70)
	at vcat.toolforge.webapp.AbstractVCatToolforgeServlet.doRequest(AbstractVCatToolforgeServlet.java:27)
	at vcat.webapp.base.AbstractVCatServlet.doGet(AbstractVCatServlet.java:32)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:239)
	at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:688)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:615)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:818)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1623)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: javax.servlet.ServletException: vcat.VCatException: Error reading Wikimedia Toolforge meta information for dbname 'frwiki'
	at vcat.toolforge.webapp.ToolforgeVCatServlet.renderedFileFromRequest(ToolforgeVCatServlet.java:184)
	at vcat.webapp.base.AbstractVCatServlet.doRequest(AbstractVCatServlet.java:42)
	... 30 more
Caused by: vcat.VCatException: Error reading Wikimedia Toolforge meta information for dbname 'frwiki'
	at vcat.toolforge.base.ToolforgeWikiProvider.fromDbname(ToolforgeWikiProvider.java:36)
	at vcat.toolforge.base.AllParamsToolforge.initWiki(AllParamsToolforge.java:21)
	at vcat.toolforge.base.AllParamsToolforge.initWiki(AllParamsToolforge.java:9)
	at vcat.params.AbstractAllParams.init(AbstractAllParams.java:79)
	at vcat.toolforge.base.AllParamsToolforge.<init>(AllParamsToolforge.java:16)
	at vcat.toolforge.webapp.ToolforgeVCatServlet.renderedFileFromRequest(ToolforgeVCatServlet.java:181)
	... 31 more
Caused by: java.sql.SQLNonTransientConnectionException: (conn=387327542) unexpected end of stream, read 0 bytes from 4 (socket was closed by server)
	at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)
	at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.create(ExceptionFactory.java:153)
	at org.mariadb.jdbc.MariaDbStatement.executeExceptionEpilogue(MariaDbStatement.java:273)
	at org.mariadb.jdbc.ClientSidePreparedStatement.executeInternal(ClientSidePreparedStatement.java:229)
	at org.mariadb.jdbc.ClientSidePreparedStatement.execute(ClientSidePreparedStatement.java:149)
	at org.mariadb.jdbc.ClientSidePreparedStatement.executeQuery(ClientSidePreparedStatement.java:163)
	at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:1471)
	at vcat.toolforge.base.ToolforgeWikiProvider.fromDbname(ToolforgeWikiProvider.java:24)
	... 36 more
Caused by: org.mariadb.jdbc.internal.util.exceptions.MariaDbSqlException: unexpected end of stream, read 0 bytes from 4 (socket was closed by server)
	at org.mariadb.jdbc.internal.util.exceptions.MariaDbSqlException.of(MariaDbSqlException.java:34)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.exceptionWithQuery(AbstractQueryProtocol.java:194)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.exceptionWithQuery(AbstractQueryProtocol.java:177)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executeQuery(AbstractQueryProtocol.java:321)
	at org.mariadb.jdbc.ClientSidePreparedStatement.executeInternal(ClientSidePreparedStatement.java:220)
	... 40 more
Caused by: java.sql.SQLNonTransientConnectionException: unexpected end of stream, read 0 bytes from 4 (socket was closed by server)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.handleIoException(AbstractQueryProtocol.java:2035)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.readPacket(AbstractQueryProtocol.java:1520)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.getResult(AbstractQueryProtocol.java:1499)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executeQuery(AbstractQueryProtocol.java:318)
	... 41 more
Caused by: java.io.EOFException: unexpected end of stream, read 0 bytes from 4 (socket was closed by server)
	at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacketArray(StandardPacketInputStream.java:249)
	at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacket(StandardPacketInputStream.java:218)
	at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.readPacket(AbstractQueryProtocol.java:1518)
	... 43 more
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