Hello, 

My current BaseXDB is at 920GB, with ~230 databases... I run jetty server visa basexhttp script with giving it explicit 30GB of RAM. While trying to access a query, thru REST api via XQUERY, I get below error. 

HTTP/1.1 400 Bad Request^M
Content-Type: text/plain;charset=UTF-8^M
Content-Length: 4207^M
Server: Jetty(8.1.16.v20140903)^M
^M
Improper use? Potential bug? Your feedback is welcome:
Contact: basex-talk@mailman.uni-konstanz.de
Version: BaseX 8.2.3
Java: Oracle Corporation, 1.7.0_95
OS: Linux, amd64
Stack Trace:
java.lang.RuntimeException: Data Access out of bounds:
- pre value: 126882320
- #used blocks: 495643
- #total locks: 495643
- access: 495642 (495643 > 495642]
        at org.basex.util.Util.notExpected(Util.java:60)
        at org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:458)
        at org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:148)
        at org.basex.data.Data.kind(Data.java:306)
        at org.basex.query.value.node.DBNode.<init>(DBNode.java:51)
        at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:68)
        at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:22)
        at org.basex.query.value.seq.Seq$1.next(Seq.java:77)
        at org.basex.query.expr.path.IterPath$1.next(IterPath.java:58)
        at org.basex.query.expr.path.IterPath$1.next(IterPath.java:36)
        at org.basex.query.MainModule$1.next(MainModule.java:114)
        at org.basex.query.func.StandardFunc.cache(StandardFunc.java:384)
        at org.basex.query.func.xquery.XQueryEval.eval(XQueryEval.java:129)
        at org.basex.query.func.xquery.XQueryEval.eval(XQueryEval.java:59)
        at org.basex.query.func.xquery.XQueryEval.value(XQueryEval.java:49)
        at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:77)
        at org.basex.query.QueryContext.value(QueryContext.java:421)
        at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:187)
        at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:95)
        at org.basex.query.MainModule$1.next(MainModule.java:114)
        at org.basex.core.cmd.AQuery.query(AQuery.java:91)
        at org.basex.core.cmd.XQuery.run(XQuery.java:22)
        at org.basex.core.Command.run(Command.java:398)
        at org.basex.http.rest.RESTCmd.run(RESTCmd.java:99)
        at org.basex.http.rest.RESTQuery.query(RESTQuery.java:74)
        at org.basex.http.rest.RESTRun.run0(RESTRun.java:41)
        at org.basex.http.rest.RESTCmd.run(RESTCmd.java:65)
        at org.basex.core.Command.run(Command.java:398)
        at org.basex.core.Command.execute(Command.java:100)
        at org.basex.core.Command.execute(Command.java:123)
        at org.basex.http.rest.RESTServlet.run(RESTServlet.java:22)
        at org.basex.http.BaseXServlet.service(BaseXServlet.java:64)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
        at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
        at org.eclipse.jetty.server.Server.handle(Server.java:370)
        at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
        at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
        at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
        at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
        at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
        at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
        at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
        at java.lang.Thread.run(Thread.java:745)


--
- Mansi