There are two kinds of solr error / warnings that I’ve seen a few times but never really investigated further. Now when in the process of migrating a big Alfresco installation from Lucene to Solr we had alot of errors and warnings that needed to be investigated and fixed.
Error/warning 1:
2015-04-28 16:11:35,532 WARN [org.alfresco.solr.tracker.CoreTracker] Node index failed and skipped for 4777625 in Tx 9223372036854775807
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:152)
at java.net.SocketInputStream.read(SocketInputStream.java:122)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
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$HttpConnectionAdapter.readLine(MultiThreadedHttpConnectionManager.java:1413)
at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973)
at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)
at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
at org.alfresco.httpclient.AbstractHttpClient.executeMethod(AbstractHttpClient.java:135)
at org.alfresco.httpclient.AbstractHttpClient.sendRemoteRequest(AbstractHttpClient.java:111)
at org.alfresco.httpclient.HttpClientFactory$DefaultHttpClient.sendRequest(HttpClientFactory.java:393)
at org.alfresco.solr.client.SOLRAPIClient.getTextContent(SOLRAPIClient.java:992)
at org.alfresco.solr.tracker.CoreTracker.addContentPropertyToDoc(CoreTracker.java:2980)
at org.alfresco.solr.tracker.CoreTracker.indexNode(CoreTracker.java:2568)
at org.alfresco.solr.tracker.CoreTracker.reindexNodes(CoreTracker.java:1057)
at org.alfresco.solr.tracker.CoreTracker.updateIndex(CoreTracker.java:566)
at org.alfresco.solr.tracker.CoreTrackerJob.execute(CoreTrackerJob.java:45)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:563)
Error/warning 2:
2015-04-28 15:02:50,413 WARN [org.alfresco.solr.tracker.CoreTracker] Node index failed and skipped for 6899573 in Tx 9223372036854775807
org.json.JSONException: Unterminated string at character 1866
at org.json.JSONTokener.syntaxError(JSONTokener.java:413)
at org.json.JSONTokener.nextString(JSONTokener.java:244)
at org.json.JSONTokener.nextValue(JSONTokener.java:344)
at org.json.JSONObject.(JSONObject.java:206)
at org.json.JSONTokener.nextValue(JSONTokener.java:347)
at org.json.JSONArray.(JSONArray.java:125)
at org.json.JSONTokener.nextValue(JSONTokener.java:351)
at org.json.JSONObject.(JSONObject.java:206)
at org.alfresco.solr.client.SOLRAPIClient.getNodesMetaData(SOLRAPIClient.java:774)
at org.alfresco.solr.tracker.CoreTracker.indexNode(CoreTracker.java:2376)
at org.alfresco.solr.tracker.CoreTracker.reindexNodes(CoreTracker.java:1057)
at org.alfresco.solr.tracker.CoreTracker.updateIndex(CoreTracker.java:566)
at org.alfresco.solr.tracker.CoreTrackerJob.execute(CoreTrackerJob.java:45)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:563)
This first part of the guide will cover the first error/warning.
This particular error comes from a timeout when Alfresco is trying to extract text content from the document. Possible causes could be a slow transformation or high load on the system. So the place to start would be to just increase the timeout in solr so that it waits around a bit longer for a response. This is done by modifying the SOLR_HOME/workspace-SpacesStore/conf/solrcore.properties and SOLR_HOME/archive-SpacesStore/conf/solrcore.properties.
The setting to look for is: alfresco.socketTimeout. Default value is 60 seconds (60000). Increase it to a level suitable for your installation such as alfresco.socketTimeout=240000 for 4 minutes timeout.
Some times increasing the timeout does not help and you see that Alfresco is working hard to serve the request. Then you might have to do with a corrupt document or a document which is too large to effectively export text content from.
Part 2 of this guide will contain information about the other error/warning. In it you will also get some tips on how to get more information about a failed index request.
How to debug solr exceptions/warnings for Alfresco (Part 2)
How to debug solr exceptions/warnings for Alfresco (Part 3)
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In alfresco-global.properties, set the property ‘solr.secureComms’ to ‘none’ and ensure that the property ‘solr.port’ is set to the correct non-SSL port of the application server in which Solr is running. Similarly, in each solrcore.properties file, set the property ‘alfresco.secureComms’ to ‘none’ and ensure that the property ‘alfresco.port’ is set to the correct non-SSL port of the application server in which your repository is running.
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