Hi Uwe,
I have observed the similer issue with my application.
Application stack:
"coreLoadExecutor-4-thread-1" #86 prio=5 os_prio=0 tid=0x00007fbb1c364800
*nid=0x1616* runnable [0x00007fbaa96ef000]
java.lang.Thread.State: RUNNABLE
at sun.nio.fs.UnixNativeDispatcher.stat0(Native Method)
at sun.nio.fs.UnixNativeDispatcher.stat(UnixNativeDispatcher.java:286)
at sun.nio.fs.UnixFileAttributes.get(UnixFileAttributes.java:70)
at sun.nio.fs.UnixFileStore.devFor(UnixFileStore.java:55)
at sun.nio.fs.UnixFileStore.<init>(UnixFileStore.java:70)
at sun.nio.fs.LinuxFileStore.<init>(LinuxFileStore.java:48)
at sun.nio.fs.LinuxFileSystem.getFileStore(LinuxFileSystem.java:112)
at
sun.nio.fs.UnixFileSystem$FileStoreIterator.readNext(UnixFileSystem.java:213)
at
sun.nio.fs.UnixFileSystem$FileStoreIterator.hasNext(UnixFileSystem.java:224)
- locked <0x00000000996864f8> (a
sun.nio.fs.UnixFileSystem$FileStoreIterator)
at org.apache.lucene.util.IOUtils.getFileStore(IOUtils.java:543)
at org.apache.lucene.util.IOUtils.spinsLinux(IOUtils.java:487)
at org.apache.lucene.util.IOUtils.spins(IOUtils.java:476)
at org.apache.lucene.util.IOUtils.spins(IOUtils.java:451)
at
*org.apache.lucene.index.ConcurrentMergeScheduler.initDynamicDefaults(ConcurrentMergeScheduler.java:376)*
- locked <0x0000000099686598> (a
org.apache.lucene.index.ConcurrentMergeScheduler)
at
org.apache.lucene.index.ConcurrentMergeScheduler.merge(ConcurrentMergeScheduler.java:464)
- locked <0x0000000099686598> (a
org.apache.lucene.index.ConcurrentMergeScheduler)
at
org.apache.lucene.index.IndexWriter.waitForMerges(IndexWriter.java:2444)
at org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1131)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1175)
at
org.apache.solr.update.SolrIndexWriter.close(SolrIndexWriter.java:291)
at org.apache.solr.core.SolrCore.initIndex(SolrCore.java:716)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:899)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:816)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:890)
at
org.apache.solr.core.CoreContainer.lambda$load$3(CoreContainer.java:542)
at org.apache.solr.core.CoreContainer$$Lambda$34/209767675.call(Unknown
Source)
at
com.codahale.metrics.InstrumentedExecutorService$InstrumentedCallable.call(InstrumentedExecutorService.java:197)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:229)
at
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor$$Lambda$35/1998024988.run(Unknown
Source)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Mount:
/dev/mapper/appvg-lv_apps /apps index location has sufficient
(100Gb+)disk free space.
starce command:
In the strace command I have observed above thread were active and
performing the operation till some point after that it doesn't do any
activity,
Jstack *nid=0x1616* = 5654
Line 54534: 5654 18:53:53.224879 open("/proc/mounts",
O_RDONLY|O_CLOEXEC
<unfinished ...>
Line 54536: 5654 18:53:53.226100 <... open resumed> ) = 2231 <0.001205>
Line 54538: 5654 18:53:53.226206 fstat(2231, <unfinished ...>
Line 54540: 5654 18:53:53.226255 <... fstat resumed>
{st_mode=S_IFREG|0444, st_size=0, ...}) = 0 <0.000039>
....
Line 55026: 5654 18:53:53.247991 stat("/net/icgudadmna1p/ctodata",
<unfinished ...>
<< thread doesn't show any activity after /net/...>>>
Could you please advice what could be the possible cause.
Java : Azule JDK1.8
org.apache.lucene-lucene-core-2.4.1.jar
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