Best way to monitor Solr regarding crashes
Hi, we were using Solr for about 3 months without problems until a few days ago it crashed one time and we don't know why. After a restart everything was fine again but we want to be better prepared the next time this could happen. So I'd like to know what's the best way to monitor a single Solr-instance and what logging-configuration you think is useful for this kind of monitoring. Maybe there's a possibility to automatically restart Solr after it crashed + to see in detail in the logs what happend right before the crash ..? Can you give me any hints? We're using Tomcat 6.X with Solr 4.8.X Cheers, Michael
Re: ClassNotFoundException regarding SolrInfoMBean under Tomcat 7
Am 05.07.2013 um 16:36 schrieb Shalin Shekhar Mangar: Okay so just for the rest of the people who dig up this thread. You had to put all the extra jar files required by typo3 into WEB-INF/lib to make this work. Is that right? Maybe this works aswell but I'd put it in a directory called lib within the core's folder. That way it is loaded automatically, too, says the example solrconfig.xml: https://svn.apache.org/repos/asf/lucene/dev/trunk/solr/example/solr/collection1/conf/solrconfig.xml Cheers, Michael Am 05.07.2013 um 16:36 schrieb Shalin Shekhar Mangar: Okay so just for the rest of the people who dig up this thread. You had to put all the extra jar files required by typo3 into WEB-INF/lib to make this work. Is that right? On Fri, Jul 5, 2013 at 8:03 PM, Michael Bakonyi kont...@mb-neuemedien.de wrote: Hi Shalin, Am 05.07.2013 um 16:23 schrieb Shalin Shekhar Mangar: There are plenty of use-cases for having multiple cores. You may have two different schemas for two different kind of documents. Perhaps you are indexing content in multiple languages and you may want a core per language. In SolrCloud, a node can have multiple cores to support more than one shard on the same box. alright, so it depends on the use case. I guess for me the different use cases will be combinations of domain.tld and language. But for me this is far future I think. The Solr war file has all the classes it needs to startup and run (well except for some optional components like DataImportHandler etc) and the SolrInfoMBean is most definitely present in the war file. Enabling or disabling jmx has nothing to do with loading that class. This is what I guessed, too. But I'm neither know Java or Tomcat nor Solr so I tried everything I could. It is very difficult to guess what's wrong with your setup this way. Why don't you try using the example jetty? It works and is well supported and optimized for Solr. Giovanni's guess was right, so this error disappeared luckily. Cheers, Michael Am 05.07.2013 um 16:23 schrieb Shalin Shekhar Mangar: On Thu, Jul 4, 2013 at 4:32 PM, Michael Bakonyi kont...@mb-neuemedien.de wrote: Hi everyone, I'm trying to get the CMS TYPO3 connected with Solr 3.6.2. By now I followed the installation at http://wiki.apache.org/solr/SolrTomcat except that I didn't copy the .war-file into the $SOLR_HOME but referencing to it at a different location via Tomcat Context fragment file. Until then the Solr-Server works – I can reach the GUI via URL. To get Solr connected with the CMS I then created a new core-folder (btw. can anybody give me kind of a live example, when to use different cores? Until now I still don't really understand the concept of cores ..) by duplicating the example-folder in which I overwrote some files (especially solrconfig.xml) with files offered by the TYPO3-community. I also moved the file solr.xml one level up and edited it (added core-fragment and especially adjusted instanceDir) to get a correct multicore-setup like in the example multicore-setup within the downloaded solr-tgz-package. There are plenty of use-cases for having multiple cores. You may have two different schemas for two different kind of documents. Perhaps you are indexing content in multiple languages and you may want a core per language. In SolrCloud, a node can have multiple cores to support more than one shard on the same box. But now I get the Java-exception java.lang.NoClassDefFoundError: org/apache/solr/core/SolrInfoMBean at java.lang.ClassLoader.defineClass1(Native Method) In the Tomcat-log file it is said additionally: Caused by: java.lang.ClassNotFoundException: org.apache.solr.core.SolrInfoMBean. My guess is, that within the new solrconfig.xml there are calls to classes which aren't included correctly. There are some libs, which are included at the top of this file but the paths of the references should be ok as I checked them via Bash: At http://wiki.apache.org/solr/SolrConfigXml it is said that the lib dir= directory is relative to the instanceDir, so this is what I've checked. I also inserted absolute paths but this wasn't successful either. Can anybody give me a hint how to solve this problem? Would be great :) The Solr war file has all the classes it needs to startup and run (well except for some optional components like DataImportHandler etc) and the SolrInfoMBean is most definitely present in the war file. Enabling or disabling jmx has nothing to do with loading that class. It is very difficult to guess what's wrong with your setup this way. Why don't you try using the example jetty? It works and is well supported and optimized for Solr. -- Regards, Shalin Shekhar Mangar. -- Regards, Shalin Shekhar Mangar.
Re: ClassNotFoundException regarding SolrInfoMBean under Tomcat 7
Hm, can't anybody help me out? I still can't get my installation run correctly ... What I've found out recently – if I understand it aright: SolrInfoMBean has somehow to do with JMX. So I manually activated JMX via inserting jmx / within my solrconfig.xml as described here: http://wiki.apache.org/solr/SolrJmx. But nevertheless the same Exception still appears ... Cheers, Michael Am 04.07.2013 um 13:02 schrieb Michael Bakonyi: Hi everyone, I'm trying to get the CMS TYPO3 connected with Solr 3.6.2. By now I followed the installation at http://wiki.apache.org/solr/SolrTomcat except that I didn't copy the .war-file into the $SOLR_HOME but referencing to it at a different location via Tomcat Context fragment file. Until then the Solr-Server works – I can reach the GUI via URL. To get Solr connected with the CMS I then created a new core-folder (btw. can anybody give me kind of a live example, when to use different cores? Until now I still don't really understand the concept of cores ..) by duplicating the example-folder in which I overwrote some files (especially solrconfig.xml) with files offered by the TYPO3-community. I also moved the file solr.xml one level up and edited it (added core-fragment and especially adjusted instanceDir) to get a correct multicore-setup like in the example multicore-setup within the downloaded solr-tgz-package. But now I get the Java-exception java.lang.NoClassDefFoundError: org/apache/solr/core/SolrInfoMBean at java.lang.ClassLoader.defineClass1(Native Method) In the Tomcat-log file it is said additionally: Caused by: java.lang.ClassNotFoundException: org.apache.solr.core.SolrInfoMBean. My guess is, that within the new solrconfig.xml there are calls to classes which aren't included correctly. There are some libs, which are included at the top of this file but the paths of the references should be ok as I checked them via Bash: At http://wiki.apache.org/solr/SolrConfigXml it is said that the lib dir= directory is relative to the instanceDir, so this is what I've checked. I also inserted absolute paths but this wasn't successful either. Can anybody give me a hint how to solve this problem? Would be great :) Cheers, Michael
Re: ClassNotFoundException regarding SolrInfoMBean under Tomcat 7
Hi Giovanni, damn, you were right! I would have never hit on that! Indeed I copied a jar into that dir as in one post I found somebody recommended that. Thx a lot for your help, now I have a look at the next error which appears ;) Cheers, Michael Am 05.07.2013 um 15:25 schrieb Giovanni Bricconi: I saw something similar when I placed some jar in tomcat/lib (data import handler), the right place was instead WEB-INF/lib. I would try placing al needed jars there. 2013/7/5 Michael Bakonyi kont...@mb-neuemedien.de Hm, can't anybody help me out? I still can't get my installation run correctly ... What I've found out recently – if I understand it aright: SolrInfoMBean has somehow to do with JMX. So I manually activated JMX via inserting jmx / within my solrconfig.xml as described here: http://wiki.apache.org/solr/SolrJmx. But nevertheless the same Exception still appears ... Cheers, Michael Am 04.07.2013 um 13:02 schrieb Michael Bakonyi: Hi everyone, I'm trying to get the CMS TYPO3 connected with Solr 3.6.2. By now I followed the installation at http://wiki.apache.org/solr/SolrTomcat except that I didn't copy the .war-file into the $SOLR_HOME but referencing to it at a different location via Tomcat Context fragment file. Until then the Solr-Server works – I can reach the GUI via URL. To get Solr connected with the CMS I then created a new core-folder (btw. can anybody give me kind of a live example, when to use different cores? Until now I still don't really understand the concept of cores ..) by duplicating the example-folder in which I overwrote some files (especially solrconfig.xml) with files offered by the TYPO3-community. I also moved the file solr.xml one level up and edited it (added core-fragment and especially adjusted instanceDir) to get a correct multicore-setup like in the example multicore-setup within the downloaded solr-tgz-package. But now I get the Java-exception java.lang.NoClassDefFoundError: org/apache/solr/core/SolrInfoMBean at java.lang.ClassLoader.defineClass1(Native Method) In the Tomcat-log file it is said additionally: Caused by: java.lang.ClassNotFoundException: org.apache.solr.core.SolrInfoMBean. My guess is, that within the new solrconfig.xml there are calls to classes which aren't included correctly. There are some libs, which are included at the top of this file but the paths of the references should be ok as I checked them via Bash: At http://wiki.apache.org/solr/SolrConfigXml it is said that the lib dir= directory is relative to the instanceDir, so this is what I've checked. I also inserted absolute paths but this wasn't successful either. Can anybody give me a hint how to solve this problem? Would be great :) Cheers, Michael
Re: ClassNotFoundException regarding SolrInfoMBean under Tomcat 7
Hi Shalin, Am 05.07.2013 um 16:23 schrieb Shalin Shekhar Mangar: There are plenty of use-cases for having multiple cores. You may have two different schemas for two different kind of documents. Perhaps you are indexing content in multiple languages and you may want a core per language. In SolrCloud, a node can have multiple cores to support more than one shard on the same box. alright, so it depends on the use case. I guess for me the different use cases will be combinations of domain.tld and language. But for me this is far future I think. The Solr war file has all the classes it needs to startup and run (well except for some optional components like DataImportHandler etc) and the SolrInfoMBean is most definitely present in the war file. Enabling or disabling jmx has nothing to do with loading that class. This is what I guessed, too. But I'm neither know Java or Tomcat nor Solr so I tried everything I could. It is very difficult to guess what's wrong with your setup this way. Why don't you try using the example jetty? It works and is well supported and optimized for Solr. Giovanni's guess was right, so this error disappeared luckily. Cheers, Michael Am 05.07.2013 um 16:23 schrieb Shalin Shekhar Mangar: On Thu, Jul 4, 2013 at 4:32 PM, Michael Bakonyi kont...@mb-neuemedien.de wrote: Hi everyone, I'm trying to get the CMS TYPO3 connected with Solr 3.6.2. By now I followed the installation at http://wiki.apache.org/solr/SolrTomcat except that I didn't copy the .war-file into the $SOLR_HOME but referencing to it at a different location via Tomcat Context fragment file. Until then the Solr-Server works – I can reach the GUI via URL. To get Solr connected with the CMS I then created a new core-folder (btw. can anybody give me kind of a live example, when to use different cores? Until now I still don't really understand the concept of cores ..) by duplicating the example-folder in which I overwrote some files (especially solrconfig.xml) with files offered by the TYPO3-community. I also moved the file solr.xml one level up and edited it (added core-fragment and especially adjusted instanceDir) to get a correct multicore-setup like in the example multicore-setup within the downloaded solr-tgz-package. There are plenty of use-cases for having multiple cores. You may have two different schemas for two different kind of documents. Perhaps you are indexing content in multiple languages and you may want a core per language. In SolrCloud, a node can have multiple cores to support more than one shard on the same box. But now I get the Java-exception java.lang.NoClassDefFoundError: org/apache/solr/core/SolrInfoMBean at java.lang.ClassLoader.defineClass1(Native Method) In the Tomcat-log file it is said additionally: Caused by: java.lang.ClassNotFoundException: org.apache.solr.core.SolrInfoMBean. My guess is, that within the new solrconfig.xml there are calls to classes which aren't included correctly. There are some libs, which are included at the top of this file but the paths of the references should be ok as I checked them via Bash: At http://wiki.apache.org/solr/SolrConfigXml it is said that the lib dir= directory is relative to the instanceDir, so this is what I've checked. I also inserted absolute paths but this wasn't successful either. Can anybody give me a hint how to solve this problem? Would be great :) The Solr war file has all the classes it needs to startup and run (well except for some optional components like DataImportHandler etc) and the SolrInfoMBean is most definitely present in the war file. Enabling or disabling jmx has nothing to do with loading that class. It is very difficult to guess what's wrong with your setup this way. Why don't you try using the example jetty? It works and is well supported and optimized for Solr. -- Regards, Shalin Shekhar Mangar.
ClassNotFoundException regarding SolrInfoMBean under Tomcat 7
Hi everyone, I'm trying to get the CMS TYPO3 connected with Solr 3.6.2. By now I followed the installation at http://wiki.apache.org/solr/SolrTomcat except that I didn't copy the .war-file into the $SOLR_HOME but referencing to it at a different location via Tomcat Context fragment file. Until then the Solr-Server works – I can reach the GUI via URL. To get Solr connected with the CMS I then created a new core-folder (btw. can anybody give me kind of a live example, when to use different cores? Until now I still don't really understand the concept of cores ..) by duplicating the example-folder in which I overwrote some files (especially solrconfig.xml) with files offered by the TYPO3-community. I also moved the file solr.xml one level up and edited it (added core-fragment and especially adjusted instanceDir) to get a correct multicore-setup like in the example multicore-setup within the downloaded solr-tgz-package. But now I get the Java-exception java.lang.NoClassDefFoundError: org/apache/solr/core/SolrInfoMBean at java.lang.ClassLoader.defineClass1(Native Method) In the Tomcat-log file it is said additionally: Caused by: java.lang.ClassNotFoundException: org.apache.solr.core.SolrInfoMBean. My guess is, that within the new solrconfig.xml there are calls to classes which aren't included correctly. There are some libs, which are included at the top of this file but the paths of the references should be ok as I checked them via Bash: At http://wiki.apache.org/solr/SolrConfigXml it is said that the lib dir= directory is relative to the instanceDir, so this is what I've checked. I also inserted absolute paths but this wasn't successful either. Can anybody give me a hint how to solve this problem? Would be great :) Cheers, Michael
