An I/O error occured while sending to the backend - Mailing list pgsql-general

Hi,

I have developed an application using the jdbc driver and 

connecting to a postgresql database .

The application mainly does the following two things：

① read data from the CSV file and insert it into the database

② perform a database query

In my application, the above ① and ② are executed asynchronously.

Everything was working fine until I increase the amount of CSV data to more than 1000.

Randomly they receive an error, the stack trace of which is below.

com.nec.neosarf.exception.NeoSarfException: org.postgresql.util.PSQLException: An I/O error occured while sending to the backend

at com.nec.neosarf.services.core.controller.DutiesDao.DutiesDaoError(DutiesDao.java:2037)

at com.nec.neosarf.services.core.controller.DutiesDao.SelectData(DutiesDao.java:459)

at com.nec.neosarf.services.core.controller.DutiesDao.SelectData(DutiesDao.java:335)

at com.nec.neosarf.services.core.controller.CoreConductor.ConductorLv3_DataAccess(CoreConductor.java:2062)

at com.nec.neosarf.services.core.controller.CoreConductor.ConductorCore(CoreConductor.java:794)

at com.nec.neosarf.services.core.controller.CoreConductor.ConductorRun(CoreConductor.java:623)

at com.nec.neosarf.services.core.controller.CoreConductor.Conductor(CoreConductor.java:356)

at com.nec.neosarf.services.core.controller.CoreBody.ConductorCreation(CoreBody.java:4817)

at com.nec.neosarf.services.core.controller.CoreBody.ActionDirectorInteface(CoreBody.java:2783)

at com.nec.neosarf.services.core.controller.CoreBody.AjaxCheck(CoreBody.java:2465)

at com.nec.neosarf.services.core.controller.CoreBody.ExecutionPageRun(CoreBody.java:1693)

at com.nec.neosarf.services.core.servlet.NeoSarf.coreServlet(NeoSarf.java:386)

at com.nec.neosarf.services.core.servlet.NeoSarf.service(NeoSarf.java:139)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711)

at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)

at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:353)

at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:313)

at com.nec.neosarf.services.core.filter.dynamic.NeoSarfFilterChain.doFilter(NeoSarfFilterChain.java:36)

at com.nec.neosarf.services.debugger.filter.DebugSynchronizedFilter.doFilter(DebugSynchronizedFilter.java:72)

at com.nec.neosarf.services.core.filter.dynamic.NeoSarfFilterChain.doFilter(NeoSarfFilterChain.java:34)

at com.nec.neosarf.services.core.filter.dynamic.DynamicRequestFilter.executeServlet(DynamicRequestFilter.java:93)

at com.nec.neosarf.services.core.filter.RequestFilter.doFilter(RequestFilter.java:450)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)

at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.base/java.lang.Thread.run(Thread.java:829)

Caused by: org.postgresql.util.PSQLException: An I/O error occured while sending to the backend

at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:382)

at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:490)

at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:408)

at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:167)

at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:119)

at org.apache.tomcat.dbcp.dbcp2.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:121)

at org.apache.tomcat.dbcp.dbcp2.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:121)

at com.nec.neosarf.db.DaoBase.selectReal(DaoBase.java:393)

at com.nec.neosarf.db.DaoBase.selectDuties(DaoBase.java:328)

at com.nec.neosarf.services.core.controller.DutiesDao.SelectData(DutiesDao.java:372)

... 42 more

Caused by: java.net.SocketTimeoutException: Read timed out

at java.base/java.net.SocketInputStream.socketRead0(Native Method)

at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:115)

at java.base/java.net.SocketInputStream.read(SocketInputStream.java:168)

at java.base/java.net.SocketInputStream.read(SocketInputStream.java:140)

at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:478)

at java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:472)

at java.base/sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:70)

at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1454)

at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:1065)

at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:161)

at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:128)

at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:113)

at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:73)

at org.postgresql.core.PGStream.receiveChar(PGStream.java:453)

at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2119)

at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:355)

... 51 more

Thanks for any help.