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[Alfresco 5.0.d] 100% CPU usage and Read timed out error

jonnypa

Hi,

in a production environment (Alfresco 5.0.d, SOLR4, 8 Core, 20 GB RAM) suddenly we're experiencing an annoying problem: Cpu usage is costantly 100%. This error appears on catalina.out:

java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:150)
        at java.net.SocketInputStream.read(SocketInputStream.java:121)
        at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
        at sun.security.ssl.InputRecord.read(InputRecord.java:503)
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:961)
        at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:918)
        at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
        at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
        at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
        at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
        at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.readLine(MultiThreadedHttpConnectionManager.java:1413)
        at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973)
        at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)
        at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098)
        at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
        at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
        at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
        at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
        at org.alfresco.httpclient.AbstractHttpClient.executeMethod(AbstractHttpClient.java:135)
        at org.alfresco.httpclient.AbstractHttpClient.sendRemoteRequest(AbstractHttpClient.java:111)
        at org.alfresco.httpclient.HttpClientFactory$HttpsClient.sendRequest(HttpClientFactory.java:385)
        at org.alfresco.solr.client.SOLRAPIClient.getTextContent(SOLRAPIClient.java:1024)
        at org.alfresco.solr.SolrInformationServer.addContentPropertyToDocUsingAlfrescoRepository(SolrInformationServer.java:2451)
        at org.alfresco.solr.SolrInformationServer.addContentToDoc(SolrInformationServer.java:2438)
        at org.alfresco.solr.SolrInformationServer.updateContentToIndexAndCache(SolrInformationServer.java:2372)
        at org.alfresco.solr.tracker.ContentTracker$ContentIndexWorkerRunnable.doWork(ContentTracker.java:133)
        at org.alfresco.solr.tracker.AbstractWorkerRunnable.run(AbstractWorkerRunnable.java:40)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

We tried a SOLR reindex but nothing has changed.

Can someone help me? Thanks in advance

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Accepted answers

angelborroy

The problems seems related to PDF Transformation.

Not sure if that is the same issue, but I created some patch for something similar in:

https://github.com/keensoft/alf-21970-repo

All comments

angelborroy

You need to identify the service that is consuming that CPU. Using some profiling tool could help for this purpose.

jonnypa

Hi, thank for this hint, using jvmtop (my envorinment is a Centos 7 Server, without GUI) this is the output:

  99.95% (     1.70s) ....alfresco.repo.content.transform.TikaPoweredContentTr()
   0.02% (     0.00s) org.alfresco.httpclient.AbstractHttpClient.executeMethod()
   0.01% (     0.00s) com.mysql.jdbc.Messages.getString()
   0.01% (     0.00s) com.mysql.jdbc.MysqlIO.readPacket()
   0.01% (     0.00s) com.mysql.jdbc.util.ReadAheadInputStream.fill()
   0.01% (     0.00s) ....mysql.jdbc.ConnectionPropertiesImpl.exposeAsProperti()
   0.00% (     0.00s) ....alfresco.repo.transaction.TransactionServiceImpl.get()
   0.00% (     0.00s) ....mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnect()
   0.00% (     0.00s) org.alfresco.jlan.netbios.server.NetBIOSNameServer.run()
   0.00% (     0.00s) org.alfresco.jlan.netbios.NetBIOSSession.DecodeName()
   0.00% (     0.00s) ....alfresco.util.exec.RuntimeExec$InputStreamReaderThre()
   0.00% (     0.00s) ....alfresco.jlan.smb.server.nio.NIOCifsConnectionsHandl()
   0.00% (     0.00s) org.mortbay.jetty.bio.SocketConnector.accept()

so alfresco.repo.content.transform.TikaPoweredContentTr() is consuming all resources. Why?

angelborroy

The problems seems related to PDF Transformation.

Not sure if that is the same issue, but I created some patch for something similar in:

https://github.com/keensoft/alf-21970-repo

jonnypa

Thank you for your reply. I can confirm that the problems were related to PDF Transformation.

Following your suggestions regarding java process monitoring and this issue, I've enabled DEBUG logging for alfresco.repo.content.transform.TransformerDebug and I found some documents with transformation issues.

Deleting these documents and restarting Alfresco, all CPU values are back to normal.

Best regards.