Re: Solr Cloud hangs when replicating updates
Hey guys, We just hit a deadlock similar to this one on 4.5, and it seems to be related to leaked connections probably due to https://issues.apache.org/jira/browse/SOLR-4327. We're going to apply the suggested change to add method.abort() in the finally block and see if it fixes things. Jessica -- View this message in context: http://lucene.472066.n3.nabble.com/Solr-Cloud-hangs-when-replicating-updates-tp4088083p4095061.html Sent from the Solr - User mailing list archive at Nabble.com.
Re: Solr Cloud hangs when replicating updates
Thanks a ton Mark. I have tried SOLR-4816 and it didn't help. But I will try Mark's patch next week, and see what happens. -Kevin On Thu, Sep 5, 2013 at 4:46 AM, Erick Erickson erickerick...@gmail.comwrote: If you run into this again, try a jstack trace. You should see evidence of being stuck in SolrCmdDistributor on a variable called semaphore... On current 4x this is around line 420. If you're using SolrJ, then SOLR-4816 is another thing to try. But Mark's patch would be best of all to test, If that doesn't fix it then the jstack suggestion would at least tell us if it's the issue we think it is. FWIW, Erick On Wed, Sep 4, 2013 at 12:51 PM, Mark Miller markrmil...@gmail.com wrote: It would be great if you could give this patch a try: http://pastebin.com/raw.php?i=aaRWwSGP - Mark On Wed, Sep 4, 2013 at 8:31 AM, Kevin Osborn kevin.osb...@cbsi.com wrote: Thanks. If there is anything I can do to help you resolve this issue, let me know. -Kevin On Wed, Sep 4, 2013 at 7:51 AM, Mark Miller markrmil...@gmail.com wrote: Ill look at fixing the root issue for 4.5. I've been putting it off for way to long. Mark Sent from my iPhone On Sep 3, 2013, at 2:15 PM, Kevin Osborn kevin.osb...@cbsi.com wrote: I was having problems updating SolrCloud with a large batch of records. The records are coming in bursts with lulls between updates. At first, I just tried large updates of 100,000 records at a time. Eventually, this caused Solr to hang. When hung, I can still query Solr. But I cannot do any deletes or other updates to the index. At first, my updates were going as SolrJ CSV posts. I have also tried local file updates and had similar results. I finally slowed things down to just use SolrJ's Update feature, which is basically just JavaBin. I am also sending over just 100 at a time in 10 threads. Again, it eventually hung. Sometimes, Solr hangs in the first couple of chunks. Other times, it hangs right away. These are my commit settings: autoCommit maxTime15000/maxTime maxDocs5000/maxDocs openSearcherfalse/openSearcher /autoCommit autoSoftCommit maxTime3/maxTime /autoSoftCommit I have tried quite a few variations with the same results. I also tried various JVM settings with the same results. The only variable seems to be that reducing the cluster size from 2 to 1 is the only thing that helps. I also did a jstack trace. I did not see any explicit deadlocks, but I did see quite a few threads in WAITING or TIMED_WAITING. It is typically something like this: java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for 0x00074039a450 (a java.util.concurrent.Semaphore$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303) at java.util.concurrent.Semaphore.acquire(Semaphore.java:317) at org.apache.solr.util.AdjustableSemaphore.acquire(AdjustableSemaphore.java:61) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:418) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:368) at org.apache.solr.update.SolrCmdDistributor.flushAdds(SolrCmdDistributor.java:300) at org.apache.solr.update.SolrCmdDistributor.distribAdd(SolrCmdDistributor.java:139) at org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:474) at org.apache.solr.handler.loader.CSVLoaderBase.doAdd(CSVLoaderBase.java:395) at org.apache.solr.handler.loader.SingleThreadedCSVLoader.addDoc(CSVLoader.java:44) at org.apache.solr.handler.loader.CSVLoaderBase.load(CSVLoaderBase.java:364) at org.apache.solr.handler.loader.CSVLoader.load(CSVLoader.java:31) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74) at
Re: Solr Cloud hangs when replicating updates
If you run into this again, try a jstack trace. You should see evidence of being stuck in SolrCmdDistributor on a variable called semaphore... On current 4x this is around line 420. If you're using SolrJ, then SOLR-4816 is another thing to try. But Mark's patch would be best of all to test, If that doesn't fix it then the jstack suggestion would at least tell us if it's the issue we think it is. FWIW, Erick On Wed, Sep 4, 2013 at 12:51 PM, Mark Miller markrmil...@gmail.com wrote: It would be great if you could give this patch a try: http://pastebin.com/raw.php?i=aaRWwSGP - Mark On Wed, Sep 4, 2013 at 8:31 AM, Kevin Osborn kevin.osb...@cbsi.com wrote: Thanks. If there is anything I can do to help you resolve this issue, let me know. -Kevin On Wed, Sep 4, 2013 at 7:51 AM, Mark Miller markrmil...@gmail.com wrote: Ill look at fixing the root issue for 4.5. I've been putting it off for way to long. Mark Sent from my iPhone On Sep 3, 2013, at 2:15 PM, Kevin Osborn kevin.osb...@cbsi.com wrote: I was having problems updating SolrCloud with a large batch of records. The records are coming in bursts with lulls between updates. At first, I just tried large updates of 100,000 records at a time. Eventually, this caused Solr to hang. When hung, I can still query Solr. But I cannot do any deletes or other updates to the index. At first, my updates were going as SolrJ CSV posts. I have also tried local file updates and had similar results. I finally slowed things down to just use SolrJ's Update feature, which is basically just JavaBin. I am also sending over just 100 at a time in 10 threads. Again, it eventually hung. Sometimes, Solr hangs in the first couple of chunks. Other times, it hangs right away. These are my commit settings: autoCommit maxTime15000/maxTime maxDocs5000/maxDocs openSearcherfalse/openSearcher /autoCommit autoSoftCommit maxTime3/maxTime /autoSoftCommit I have tried quite a few variations with the same results. I also tried various JVM settings with the same results. The only variable seems to be that reducing the cluster size from 2 to 1 is the only thing that helps. I also did a jstack trace. I did not see any explicit deadlocks, but I did see quite a few threads in WAITING or TIMED_WAITING. It is typically something like this: java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for 0x00074039a450 (a java.util.concurrent.Semaphore$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303) at java.util.concurrent.Semaphore.acquire(Semaphore.java:317) at org.apache.solr.util.AdjustableSemaphore.acquire(AdjustableSemaphore.java:61) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:418) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:368) at org.apache.solr.update.SolrCmdDistributor.flushAdds(SolrCmdDistributor.java:300) at org.apache.solr.update.SolrCmdDistributor.distribAdd(SolrCmdDistributor.java:139) at org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:474) at org.apache.solr.handler.loader.CSVLoaderBase.doAdd(CSVLoaderBase.java:395) at org.apache.solr.handler.loader.SingleThreadedCSVLoader.addDoc(CSVLoader.java:44) at org.apache.solr.handler.loader.CSVLoaderBase.load(CSVLoaderBase.java:364) at org.apache.solr.handler.loader.CSVLoader.load(CSVLoader.java:31) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1904) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:659) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:362) at
RE: Solr Cloud hangs when replicating updates
Kevin, Take a look at http://lucene.472066.n3.nabble.com/updating-docs-in-solr-cloud-hangs-td4067388.html and https://issues.apache.org/jira/browse/SOLR-4816. I had the same issue that you're reporting for a while then I applied the patch from SOLR-4816 to my clients and the problems went away. If you don't feel like applying the patch it looks like it should be included in the release of version 4.5. Also note that the problem happens more frequently when the replication factor is greater than 1. Thanks, Greg -Original Message- From: kevin.osb...@cbsinteractive.com [mailto:kevin.osb...@cbsinteractive.com] On Behalf Of Kevin Osborn Sent: Tuesday, September 03, 2013 4:16 PM To: solr-user Subject: Solr Cloud hangs when replicating updates I was having problems updating SolrCloud with a large batch of records. The records are coming in bursts with lulls between updates. At first, I just tried large updates of 100,000 records at a time. Eventually, this caused Solr to hang. When hung, I can still query Solr. But I cannot do any deletes or other updates to the index. At first, my updates were going as SolrJ CSV posts. I have also tried local file updates and had similar results. I finally slowed things down to just use SolrJ's Update feature, which is basically just JavaBin. I am also sending over just 100 at a time in 10 threads. Again, it eventually hung. Sometimes, Solr hangs in the first couple of chunks. Other times, it hangs right away. These are my commit settings: autoCommit maxTime15000/maxTime maxDocs5000/maxDocs openSearcherfalse/openSearcher /autoCommit autoSoftCommit maxTime3/maxTime /autoSoftCommit I have tried quite a few variations with the same results. I also tried various JVM settings with the same results. The only variable seems to be that reducing the cluster size from 2 to 1 is the only thing that helps. I also did a jstack trace. I did not see any explicit deadlocks, but I did see quite a few threads in WAITING or TIMED_WAITING. It is typically something like this: java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for 0x00074039a450 (a java.util.concurrent.Semaphore$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303) at java.util.concurrent.Semaphore.acquire(Semaphore.java:317) at org.apache.solr.util.AdjustableSemaphore.acquire(AdjustableSemaphore.java:61) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:418) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:368) at org.apache.solr.update.SolrCmdDistributor.flushAdds(SolrCmdDistributor.java:300) at org.apache.solr.update.SolrCmdDistributor.distribAdd(SolrCmdDistributor.java:139) at org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:474) at org.apache.solr.handler.loader.CSVLoaderBase.doAdd(CSVLoaderBase.java:395) at org.apache.solr.handler.loader.SingleThreadedCSVLoader.addDoc(CSVLoader.java:44) at org.apache.solr.handler.loader.CSVLoaderBase.load(CSVLoaderBase.java:364) at org.apache.solr.handler.loader.CSVLoader.load(CSVLoader.java:31) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1904) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:659) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:362) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) at
Re: Solr Cloud hangs when replicating updates
Thanks. If there is anything I can do to help you resolve this issue, let me know. -Kevin On Wed, Sep 4, 2013 at 7:51 AM, Mark Miller markrmil...@gmail.com wrote: Ill look at fixing the root issue for 4.5. I've been putting it off for way to long. Mark Sent from my iPhone On Sep 3, 2013, at 2:15 PM, Kevin Osborn kevin.osb...@cbsi.com wrote: I was having problems updating SolrCloud with a large batch of records. The records are coming in bursts with lulls between updates. At first, I just tried large updates of 100,000 records at a time. Eventually, this caused Solr to hang. When hung, I can still query Solr. But I cannot do any deletes or other updates to the index. At first, my updates were going as SolrJ CSV posts. I have also tried local file updates and had similar results. I finally slowed things down to just use SolrJ's Update feature, which is basically just JavaBin. I am also sending over just 100 at a time in 10 threads. Again, it eventually hung. Sometimes, Solr hangs in the first couple of chunks. Other times, it hangs right away. These are my commit settings: autoCommit maxTime15000/maxTime maxDocs5000/maxDocs openSearcherfalse/openSearcher /autoCommit autoSoftCommit maxTime3/maxTime /autoSoftCommit I have tried quite a few variations with the same results. I also tried various JVM settings with the same results. The only variable seems to be that reducing the cluster size from 2 to 1 is the only thing that helps. I also did a jstack trace. I did not see any explicit deadlocks, but I did see quite a few threads in WAITING or TIMED_WAITING. It is typically something like this: java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for 0x00074039a450 (a java.util.concurrent.Semaphore$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303) at java.util.concurrent.Semaphore.acquire(Semaphore.java:317) at org.apache.solr.util.AdjustableSemaphore.acquire(AdjustableSemaphore.java:61) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:418) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:368) at org.apache.solr.update.SolrCmdDistributor.flushAdds(SolrCmdDistributor.java:300) at org.apache.solr.update.SolrCmdDistributor.distribAdd(SolrCmdDistributor.java:139) at org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:474) at org.apache.solr.handler.loader.CSVLoaderBase.doAdd(CSVLoaderBase.java:395) at org.apache.solr.handler.loader.SingleThreadedCSVLoader.addDoc(CSVLoader.java:44) at org.apache.solr.handler.loader.CSVLoaderBase.load(CSVLoaderBase.java:364) at org.apache.solr.handler.loader.CSVLoader.load(CSVLoader.java:31) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1904) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:659) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:362) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) at
Re: Solr Cloud hangs when replicating updates
Ill look at fixing the root issue for 4.5. I've been putting it off for way to long. Mark Sent from my iPhone On Sep 3, 2013, at 2:15 PM, Kevin Osborn kevin.osb...@cbsi.com wrote: I was having problems updating SolrCloud with a large batch of records. The records are coming in bursts with lulls between updates. At first, I just tried large updates of 100,000 records at a time. Eventually, this caused Solr to hang. When hung, I can still query Solr. But I cannot do any deletes or other updates to the index. At first, my updates were going as SolrJ CSV posts. I have also tried local file updates and had similar results. I finally slowed things down to just use SolrJ's Update feature, which is basically just JavaBin. I am also sending over just 100 at a time in 10 threads. Again, it eventually hung. Sometimes, Solr hangs in the first couple of chunks. Other times, it hangs right away. These are my commit settings: autoCommit maxTime15000/maxTime maxDocs5000/maxDocs openSearcherfalse/openSearcher /autoCommit autoSoftCommit maxTime3/maxTime /autoSoftCommit I have tried quite a few variations with the same results. I also tried various JVM settings with the same results. The only variable seems to be that reducing the cluster size from 2 to 1 is the only thing that helps. I also did a jstack trace. I did not see any explicit deadlocks, but I did see quite a few threads in WAITING or TIMED_WAITING. It is typically something like this: java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for 0x00074039a450 (a java.util.concurrent.Semaphore$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303) at java.util.concurrent.Semaphore.acquire(Semaphore.java:317) at org.apache.solr.util.AdjustableSemaphore.acquire(AdjustableSemaphore.java:61) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:418) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:368) at org.apache.solr.update.SolrCmdDistributor.flushAdds(SolrCmdDistributor.java:300) at org.apache.solr.update.SolrCmdDistributor.distribAdd(SolrCmdDistributor.java:139) at org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:474) at org.apache.solr.handler.loader.CSVLoaderBase.doAdd(CSVLoaderBase.java:395) at org.apache.solr.handler.loader.SingleThreadedCSVLoader.addDoc(CSVLoader.java:44) at org.apache.solr.handler.loader.CSVLoaderBase.load(CSVLoaderBase.java:364) at org.apache.solr.handler.loader.CSVLoader.load(CSVLoader.java:31) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1904) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:659) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:362) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154) It basically appears that Solr
Re: Solr Cloud hangs when replicating updates
It would be great if you could give this patch a try: http://pastebin.com/raw.php?i=aaRWwSGP - Mark On Wed, Sep 4, 2013 at 8:31 AM, Kevin Osborn kevin.osb...@cbsi.com wrote: Thanks. If there is anything I can do to help you resolve this issue, let me know. -Kevin On Wed, Sep 4, 2013 at 7:51 AM, Mark Miller markrmil...@gmail.com wrote: Ill look at fixing the root issue for 4.5. I've been putting it off for way to long. Mark Sent from my iPhone On Sep 3, 2013, at 2:15 PM, Kevin Osborn kevin.osb...@cbsi.com wrote: I was having problems updating SolrCloud with a large batch of records. The records are coming in bursts with lulls between updates. At first, I just tried large updates of 100,000 records at a time. Eventually, this caused Solr to hang. When hung, I can still query Solr. But I cannot do any deletes or other updates to the index. At first, my updates were going as SolrJ CSV posts. I have also tried local file updates and had similar results. I finally slowed things down to just use SolrJ's Update feature, which is basically just JavaBin. I am also sending over just 100 at a time in 10 threads. Again, it eventually hung. Sometimes, Solr hangs in the first couple of chunks. Other times, it hangs right away. These are my commit settings: autoCommit maxTime15000/maxTime maxDocs5000/maxDocs openSearcherfalse/openSearcher /autoCommit autoSoftCommit maxTime3/maxTime /autoSoftCommit I have tried quite a few variations with the same results. I also tried various JVM settings with the same results. The only variable seems to be that reducing the cluster size from 2 to 1 is the only thing that helps. I also did a jstack trace. I did not see any explicit deadlocks, but I did see quite a few threads in WAITING or TIMED_WAITING. It is typically something like this: java.lang.Thread.State: WAITING (parking) at sun.misc.Unsafe.park(Native Method) - parking to wait for 0x00074039a450 (a java.util.concurrent.Semaphore$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:994) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303) at java.util.concurrent.Semaphore.acquire(Semaphore.java:317) at org.apache.solr.util.AdjustableSemaphore.acquire(AdjustableSemaphore.java:61) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:418) at org.apache.solr.update.SolrCmdDistributor.submit(SolrCmdDistributor.java:368) at org.apache.solr.update.SolrCmdDistributor.flushAdds(SolrCmdDistributor.java:300) at org.apache.solr.update.SolrCmdDistributor.distribAdd(SolrCmdDistributor.java:139) at org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:474) at org.apache.solr.handler.loader.CSVLoaderBase.doAdd(CSVLoaderBase.java:395) at org.apache.solr.handler.loader.SingleThreadedCSVLoader.addDoc(CSVLoader.java:44) at org.apache.solr.handler.loader.CSVLoaderBase.load(CSVLoaderBase.java:364) at org.apache.solr.handler.loader.CSVLoader.load(CSVLoader.java:31) at org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1904) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:659) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:362) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at
