On a Pentium IV 2,53 GHZ with 1 GB Ram I installed Zimbra 3.1.4 opensource on Suse OSS 10

Sometimes some services of zimbra stop working, this happens on diffirent times. (Tomcat, Antivirus, Mailbox). Just starting the services is enough, and the problems are solved for a while.

Everyday 3 or 4 times I see the following error in the /opt/zimbra/log/zimbra.log:

Code:
2006-08-21 12:07:08,793 WARN  [http-443-Processor99] [] [SoapServlet] - Servlet.service() for servlet SoapServlet threw exception
java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:129)
        at com.sun.net.ssl.internal.ssl.InputRecord.readFully(InputRecord.java:284)
        at com.sun.net.ssl.internal.ssl.InputRecord.read(InputRecord.java:319)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:720)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:677)
        at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)
        at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:747)
        at org.apache.coyote.http11.InternalInputBuffer$InputStreamInputBuffer.doRead(InternalInputBuffer.java:777)
        at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java:115)
        at org.apache.coyote.http11.InternalInputBuffer.doRead(InternalInputBuffer.java:712)
        at org.apache.coyote.Request.doRead(Request.java:423)
        at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:283)
        at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:404)
        at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:298)
        at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:192)
        at com.zimbra.cs.servlet.ZimbraServlet.readFully(ZimbraServlet.java:176)
        at com.zimbra.soap.SoapServlet.doPost(SoapServlet.java:213)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
        at com.zimbra.cs.servlet.ZimbraServlet.service(ZimbraServlet.java:154)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
And this morning Tomcat stoppped working:

Code:
2006-08-21 05:31:50,394 INFO  [main] [] StatsImageServlet - Servlet StatsImageServlet shutting down
2006-08-21 05:31:50,395 INFO  [main] [] soap - Servlet AdminServlet shutting down
2006-08-21 05:31:50,396 INFO  [main] [] TcpServer/7025 - LmtpServer initiating shutdown
2006-08-21 05:31:50,396 INFO  [LmtpServer] [] TcpServer/7025 - finished accept loop
2006-08-21 05:31:50,405 INFO  [main] [] TcpServer/7025 - LmtpServer shutting down idle thread pool
2006-08-21 05:31:50,405 INFO  [main] [] TcpServer/110 - Pop3Server initiating shutdown
2006-08-21 05:31:50,406 INFO  [Pop3Server] [] TcpServer/110 - finished accept loop
2006-08-21 05:31:50,406 INFO  [main] [] TcpServer/110 - Pop3Server shutting down idle thread pool
2006-08-21 05:31:50,406 INFO  [main] [] TcpServer/995 - Pop3Server initiating shutdown
2006-08-21 05:31:50,406 INFO  [Pop3Server] [] TcpServer/995 - finished accept loop
2006-08-21 05:31:50,407 INFO  [main] [] TcpServer/995 - Pop3Server shutting down idle thread pool
2006-08-21 05:31:50,407 INFO  [main] [] TcpServer/143 - ImapServer initiating shutdown
2006-08-21 05:31:50,407 INFO  [ImapServer] [] TcpServer/143 - finished accept loop
2006-08-21 05:31:50,407 INFO  [main] [] TcpServer/143 - ImapServer shutting down idle thread pool
2006-08-21 05:31:50,408 INFO  [main] [] TcpServer/993 - ImapSSLServer initiating shutdown
2006-08-21 05:31:50,408 INFO  [ImapSSLServer] [] TcpServer/993 - finished accept loop
2006-08-21 05:31:50,410 INFO  [main] [] TcpServer/993 - ImapSSLServer shutting down idle thread pool
2006-08-21 05:31:50,422 INFO  [main] [] SessionCache - shutdown: clearing SessionCache
2006-08-21 05:31:50,423 INFO  [IndexWritersSweeper] [] MailboxIndex - IndexWritersSweeper thread exiting
2006-08-21 05:31:50,423 INFO  [main] [] MailboxIndex - Flushing all open index writers
2006-08-21 05:31:50,503 INFO  [main] [] RedoLogManager - Logged: 8 items, 3.75ms/item
2006-08-21 05:31:50,503 INFO  [IncomingDirectorySweeper] [] FileBlobStore - IncomingDirectorySweeper thread exiting
2006-08-21 05:31:50,505 INFO  [main] [] extensions - Destroying extensions
2006-08-21 05:31:50,514 INFO  [main] [] extensions - Destroyed extension clamscanner: com.zimbra.clam.ClamScanner@com.zimbra.cs.extension.ZimbraExtensionClassLoader@159d510
2006-08-21 05:31:50,515 INFO  [main] [] ContentServlet - Servlet ContentServlet shutting down
2006-08-21 05:31:50,516 INFO  [main] [] PublicICalServlet - Servlet PublicICalServlet shutting down
2006-08-21 05:31:50,517 INFO  [main] [] soap - Servlet SoapServlet shutting down
2006-08-21 05:31:50,518 INFO  [main] [] account - Servlet PreAuthServlet shutting down
2006-08-21 05:31:50,518 INFO  [main] [] mailbox - Servlet UserServlet shutting down
2006-08-21 05:31:50,519 INFO  [main] [] FileUploadServlet - Servlet FileUploadServlet shutting down
2006-08-21 07:47:02,989 INFO  [main] [] soap - Servlet SoapServlet starting up
2006-08-21 07:47:03,172 INFO  [main] [] soap - Adding service AccountService to SoapServlet
2006-08-21 07:47:03,268 INFO  [main] [] soap - Adding service MailService to SoapServlet
2006-08-21 07:47:03,492 INFO  [main] [] soap - Adding service IMService to SoapServlet
2006-08-21 07:47:03,501 INFO  [main] [] misc - version=3.1.4_GA_518.SuSE10 release=20060626141957 builddate=20060626-1420 buildhost=build-suse10
2006-08-21 07:47:03,503 INFO  [main] [] misc - LANG environment is set to: C
2006-08-21 07:47:03,717 INFO  [main] [] DbPool - Setting mysql connector property: maxActive=10
2006-08-21 07:47:04,567 INFO  [main] [] extensions - Loading extensions from /opt/zimbra/lib/ext
2006-08-21 07:47:04,571 INFO  [main] [] extensions - extension com.zimbra.clam.ClamScanner found in /opt/zimbra/lib/ext/clamscanner/clamscanner.jar
2006-08-21 07:47:04,572 INFO  [main] [] extensions - Initializing extensions
2006-08-21 07:47:04,583 INFO  [main] [] ClamScanner - attachment scan is disabled
2006-08-21 07:47:04,717 INFO  [main] [] extensions - Initialized extension clamscanner: com.zimbra.clam.ClamScanner@com.zimbra.cs.extension.ZimbraExtensionClassLoader@159d510
2006-08-21 07:47:04,781 INFO  [IndexWritersSweeper] [] MailboxIndex - IndexWritersSweeper thread starting
2006-08-21 07:47:04,783 INFO  [main] [] RedoLogManager - Starting pre-startup crash recovery
2006-08-21 07:47:04,806 INFO  [main] [] RedoPlayer - No uncommitted transactions to redo
2006-08-21 07:47:04,890 INFO  [main] [] RedoLogManager - Finished pre-startup crash recovery
2006-08-21 07:47:05,039 INFO  [LmtpServer] [] TcpServer/7025 - starting accept loop
2006-08-21 07:47:05,189 INFO  [Pop3Server] [] TcpServer/995 - starting accept loop
2006-08-21 07:47:05,194 INFO  [ImapServer] [] TcpServer/143 - starting accept loop
2006-08-21 07:47:05,215 INFO  [ImapSSLServer] [] TcpServer/993 - starting accept loop
2006-08-21 07:47:05,216 INFO  [main] [] soap - Servlet AdminServlet starting up
2006-08-21 07:47:05,340 INFO  [main] [] soap - Adding service AdminService to AdminServlet
2006-08-21 07:47:05,360 INFO  [main] [] soap - Adding service AccountService to AdminServlet
2006-08-21 07:47:05,361 INFO  [main] [] soap - Adding service MailService to AdminServlet
2006-08-21 07:47:05,361 INFO  [main] [] soap - Adding service IMService to AdminServlet
2006-08-21 07:47:05,368 INFO  [main] [] ContentServlet - Servlet ContentServlet starting up
2006-08-21 07:47:05,372 INFO  [main] [] PublicICalServlet - Servlet PublicICalServlet starting up
2006-08-21 07:47:05,377 INFO  [main] [] account - Servlet PreAuthServlet starting up
2006-08-21 07:47:05,418 INFO  [main] [] mailbox - Servlet UserServlet starting up
2006-08-21 07:47:05,429 INFO  [main] [] FileUploadServlet - Servlet FileUploadServlet starting up
2006-08-21 07:47:05,435 INFO  [main] [] StatsImageServlet - Servlet StatsImageServlet starting up
2006-08-21 07:47:05,499 INFO  [Pop3Server] [] TcpServer/110 - starting accept loop
2006-08-21 07:47:17,280 INFO  [LmtpServer-1] [] LmtpHandler - [172.25.80.1] connected
2006-08-21 07:47:17,540 INFO  [LmtpServer-1] [] JMSession - SMTP Server: mimosa.acrux.nl
2006-08-21 07:47:17,682 WARN  [LmtpServer-1] [] misc - LC.get(debug_validate_outgoing_icalendar) was null, returning empty string
2006-08-21 07:47:17,682 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_conversation) was null, returning empty string
2006-08-21 07:47:17,682 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_filter) was null, returning empty string
2006-08-21 07:47:17,683 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_message_analysis) was null, returning empty string
2006-08-21 07:47:17,683 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_mime_part_extraction) was null, returning empty string
2006-08-21 07:47:17,683 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_indexing) was null, returning empty string
2006-08-21 07:47:17,683 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_objects) was null, returning empty string
2006-08-21 07:47:17,683 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_indexing_attachments_separately) was null, returning empty string
2006-08-21 07:47:17,683 WARN  [LmtpServer-1] [] misc - LC.get(debug_disable_indexing_attachments_together) was null, returning empty string
2006-08-21 07:47:18,071 INFO  [LmtpServer-1] [] zimlet - Loaded class com.zimbra.cs.zimlet.handler.NANPHandler
2006-08-21 07:47:18,078 INFO  [LmtpServer-1] [] zimlet - Loaded class com.zimbra.cs.zimlet.handler.TrackingHandler
2006-08-21 07:47:18,081 INFO  [LmtpServer-1] [] zimlet - Loaded class com.zimbra.cs.zimlet.handler.URLHandler
Does anyone know what causes these failures?