große PDF-Dateien OutOfMemoryError

Question

I Byte-Array haben, die als Datei zurück müssen, um das Frontend. Dazu verwende ich IOUtils.write aber wenn die Datei größer als 15-20MB ist werfen es: gescheitert; error = 'Speicher kann nicht belegt werden' (errno = 12) und mein Tomcat 7 stirbt.

Ich muss es neu starten zu arbeiten.

Tomcat mit 1,5 GB RAM und Dual-Core-CPU

Hier beginnt mein Code:

OutputStream outputStream = null; 
     try{ 
      outputStream = response.getOutputStream(); 
      IOUtils.write(imgbytes, outputStream); 
      outputStream.flush(); 
     }catch(IOException ioException){ 
      logger.error("IO ERROR - ", ioException); 
     }finally{ 
      if(outputStream != null){ 
       try { 
        outputStream.close(); 
       } catch (IOException e) { 
        logger.error("Error closing stream - ", e); 
       } 
      } 
     } 

Und hier ist der Fehler:

[2016-11-21 04:07:02] ERROR [http-bio-8080-exec-7] org.fwo.controller.FileController (FileController.java:43) - IO ERROR - 
ClientAbortException: java.net.SocketException: Connection reset 
    at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:413) 
    at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:371) 
    at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:438) 
    at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:426) 
    at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:91) 
    at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:84) 
    at org.apache.commons.io.IOUtils.write(IOUtils.java:1177) 
    at org.fwo.controller.FileController.getFile(FileController.java:40) 
    at sun.reflect.GeneratedMethodAccessor403.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:212) 
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126) 
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578) 
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
    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.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:427) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) 
    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:315) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:745) 
Caused by: java.net.SocketException: Connection reset 
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:118) 
    at java.net.SocketOutputStream.write(SocketOutputStream.java:159) 
    at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:215) 
    at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:480) 
    at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:366) 
    at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:240) 
    at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:119) 
    at org.apache.coyote.http11.AbstractOutputBuffer.doWrite(AbstractOutputBuffer.java:192) 
    at org.apache.coyote.Response.doWrite(Response.java:520) 
    at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:408) 
    ... 45 more 
started 
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000007c1780000, 95420416, 0) failed; error='Cannot allocate memory' (errno=12) 
# 
# There is insufficient memory for the Java Runtime Environment to continue. 
# Native memory allocation (malloc) failed to allocate 95420416 bytes for committing reserved memory. 
# An error report file with more information is saved as: 
# /tmp/hs_err_pid4983.log 

Answer 1

Die Fehlermeldung sagt, dass Sie gehen native Speicher aus, so meine Vermutung ist, dass Sie eine 32-Bit-JVM unter Windows ausführen.

Ein 32-Bit-Prozess hat 4 GB Speicher und Fenster werden 2 GB in der Regel für sich behalten, so dass Sie mit 2 GB Arbeitsspeicher verbleiben. Ihr Heap benötigt 1,5 GB, so dass wenig Platz für den Off-Heap-Speicher verbleibt, in dem die native Zuweisung erfolgen soll.

Lösung: entweder Ihre Heap-Größe auf 1 GB reduzieren, um mehr Platz für die Off-Heap-Speicher oder zu einem 64-Bit-JVM zu machen.