Salud:
since yesterday we are experimenting a serious problem with our dSpace
installation (version 5.4). It seems that dspace has problems to perform
the database queries which bring to the interface the bitstreams and logos
(logos of collections are not shown, the same happens with bitstreams).
After some minutes dspace interface shows an internal error message. This
is the first time we experienced this problem after some years of running
dSpace without any problem.
When I list the processes related with dspace, a set of dspace-postgresql
request idle processes is shown. The connection pool accepts up to 100
connections opened at the same time, but the list of idle dspace-postgres
idle processes is not so big, it pills up to 10 processes around.
It seems that the problems is related with the queries that bring the
bitstreams because the tables locked by the idle processes are .
bitstream
bundle2bitstream
bundle
fileextension
We tried to restart postgres, tomcat and the whole server but the problem
persists.
The log file shows this
ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL connection Error -
org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool
error Timeout waiting for idle object
at
org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:114)
at
org.dspace.storage.rdbms.DatabaseManager.getConnection(DatabaseManager.java:634)
at org.dspace.core.Context.init(Context.java:121)
at org.dspace.core.Context.<init>(Context.java:95)
at org.dspace.app.webui.util.UIUtil.obtainContext(UIUtil.java:105)
at
org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:100)
at
org.dspace.app.webui.servlet.DSpaceServlet.doGet(DSpaceServlet.java:67)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
at
org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:958)
at
org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106)
... 27 more
Camilo Freire
Biblioteca Nacional
Uruguay
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