Hello @all,

I've got a problem with Solr (version 7.7.2) since some days.

On March, 4th I got an OOM and the log file just says the following:

Running OOM killer script for process 12351 for Solr on port 8983
Killed process 12351

So I started the service again and the service is running fine. But if I try to 
search something I only get the error that the string I searched for wasn't 
found. Next, I tried to see the status of the process. That only gives me the 
following error message:

./solr status

Found 1 Solr nodes:

Solr process 1519 running on port 8983

ERROR: Failed to get system information from http://localhost:8983/solr due to: 
org.apache.http.client.ClientProtocolException: Expected JSON response from 
server but received: <html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<title>Error 404 Not Found</title>
</head>
<body><h2>HTTP ERROR 404</h2>
<p>Problem accessing /solr/admin/info/system. Reason:
<pre>    Not Found</pre></p><h3>Caused 
by:</h3><pre>javax.servlet.ServletException: 
javax.servlet.UnavailableException: Error processing the request. CoreContainer 
is either not initialized or shutting down.
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at org.eclipse.jetty.server.Server.handle(Server.java:502)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
        at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
        at 
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
        at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: javax.servlet.UnavailableException: Error processing the request. 
CoreContainer is either not initialized or shutting down.
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:359)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:341)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
        ... 17 more
</pre>
<h3>Caused by:</h3><pre>javax.servlet.UnavailableException: Error processing 
the request. CoreContainer is either not initialized or shutting down.
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:359)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:341)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at org.eclipse.jetty.server.Server.handle(Server.java:502)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
        at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
        at 
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
        at java.base/java.lang.Thread.run(Thread.java:834)
</pre>

</body>
</html>

Typically, this indicates a problem with the Solr server; check the Solr server 
logs for more information.

By trying to do a direct search I'll get:

curl http://localhost:8983/solr/<MYCORE>/select?wt=json&q=htp_all:test
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<title>Error 404 Not Found</title>
</head>
<body><h2>HTTP ERROR 404</h2>
<p>Problem accessing /solr/<MYCORE>/select. Reason:
<pre>    Not Found</pre></p><h3>Caused 
by:</h3><pre>javax.servlet.ServletException: 
javax.servlet.UnavailableException: Error processing the request. CoreContainer 
is either not initialized or shutting down.
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at org.eclipse.jetty.server.Server.handle(Server.java:502)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
        at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
        at 
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
        at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: javax.servlet.UnavailableException: Error processing the request. 
CoreContainer is either not initialized or shutting down.
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:359)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:341)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
        ... 17 more
</pre>
<h3>Caused by:</h3><pre>javax.servlet.UnavailableException: Error processing 
the request. CoreContainer is either not initialized or shutting down.
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:359)
        at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:341)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at 
org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
        at org.eclipse.jetty.server.Server.handle(Server.java:502)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
        at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
        at 
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
        at java.base/java.lang.Thread.run(Thread.java:834)
</pre>

</body>
</html>

The requestHandler (/select) is defined.

But there is no other error inside the logs. Even a reboot oft he system does 
not help.

solr-8983-console.log:
[0.008s][info][gc] Using G1
[5.760s][info][gc] GC(0) Pause Young (Concurrent Start) (Metadata GC Threshold) 
45M->5M(512M) 12.335ms
[5.760s][info][gc] GC(1) Concurrent Cycle
[5.822s][info][gc] GC(1) Pause Remark 5M->5M(512M) 6.213ms
[5.822s][info][gc] GC(1) Pause Cleanup 5M->5M(512M) 0.111ms
[5.825s][info][gc] GC(1) Concurrent Cycle 64.785ms
[431.239s][info][gc] GC(2) Pause Young (Normal) (G1 Evacuation Pause) 
128M->14M(512M) 49.997ms

solr_gc.log:
[2020-03-05T11:48:14.743+0100][0.003s] Heap region size: 1M
[2020-03-05T11:48:14.749+0100][0.008s] Using G1
[2020-03-05T11:48:14.749+0100][0.008s] Heap address: 0x00000000e0000000, size: 
512 MB, Compressed Oops mode: 32-bit
[2020-03-05T11:48:20.488+0100][5.748s] GC(0) Pause Young (Concurrent Start) 
(Metadata GC Threshold)
[2020-03-05T11:48:20.488+0100][5.748s] GC(0) Using 4 workers of 4 for evacuation
[2020-03-05T11:48:20.500+0100][5.760s] GC(0)   Pre Evacuate Collection Set: 
0.0ms
[2020-03-05T11:48:20.500+0100][5.760s] GC(0)   Evacuate Collection Set: 9.2ms
[2020-03-05T11:48:20.500+0100][5.760s] GC(0)   Post Evacuate Collection Set: 
2.7ms
[2020-03-05T11:48:20.500+0100][5.760s] GC(0)   Other: 0.4ms
[2020-03-05T11:48:20.500+0100][5.760s] GC(0) Eden regions: 46->0(123)
[2020-03-05T11:48:20.500+0100][5.760s] GC(0) Survivor regions: 0->5(32)
[2020-03-05T11:48:20.500+0100][5.760s] GC(0) Old regions: 0->0
[2020-03-05T11:48:20.500+0100][5.760s] GC(0) Humongous regions: 0->0
[2020-03-05T11:48:20.500+0100][5.760s] GC(0) Metaspace: 20631K->20631K(1069056K)
[2020-03-05T11:48:20.500+0100][5.760s] GC(0) Pause Young (Concurrent Start) 
(Metadata GC Threshold) 45M->5M(512M) 12.335ms
[2020-03-05T11:48:20.500+0100][5.760s] GC(0) User=0.02s Sys=0.00s Real=0.01s
[2020-03-05T11:48:20.501+0100][5.760s] GC(1) Concurrent Cycle
[2020-03-05T11:48:20.501+0100][5.760s] GC(1) Concurrent Clear Claimed Marks
[2020-03-05T11:48:20.501+0100][5.760s] GC(1) Concurrent Clear Claimed Marks 
0.030ms
[2020-03-05T11:48:20.501+0100][5.760s] GC(1) Concurrent Scan Root Regions
[2020-03-05T11:48:20.513+0100][5.772s] GC(1) Concurrent Scan Root Regions 
12.151ms
[2020-03-05T11:48:20.513+0100][5.772s] GC(1) Concurrent Mark (5.772s)
[2020-03-05T11:48:20.513+0100][5.772s] GC(1) Concurrent Mark From Roots
[2020-03-05T11:48:20.513+0100][5.772s] GC(1) Using 4 workers of 4 for marking
[2020-03-05T11:48:20.523+0100][5.783s] GC(1) Concurrent Mark From Roots 10.331ms
[2020-03-05T11:48:20.523+0100][5.783s] GC(1) Concurrent Preclean
[2020-03-05T11:48:20.523+0100][5.783s] GC(1) Concurrent Preclean 0.068ms
[2020-03-05T11:48:20.523+0100][5.783s] GC(1) Concurrent Mark (5.772s, 5.783s) 
10.439ms
[2020-03-05T11:48:20.556+0100][5.816s] GC(1) Pause Remark
[2020-03-05T11:48:20.562+0100][5.822s] GC(1) Cleaned string and symbol table, 
strings: 10640 processed, 0 removed, symbols: 69930 processed, 13 removed
[2020-03-05T11:48:20.562+0100][5.822s] GC(1) Pause Remark 5M->5M(512M) 6.213ms
[2020-03-05T11:48:20.562+0100][5.822s] GC(1) User=0.00s Sys=0.01s Real=0.01s
[2020-03-05T11:48:20.562+0100][5.822s] GC(1) Concurrent Rebuild Remembered Sets
[2020-03-05T11:48:20.562+0100][5.822s] GC(1) Concurrent Rebuild Remembered Sets 
0.084ms
[2020-03-05T11:48:20.562+0100][5.822s] GC(1) Pause Cleanup
[2020-03-05T11:48:20.563+0100][5.822s] GC(1) Pause Cleanup 5M->5M(512M) 0.111ms
[2020-03-05T11:48:20.563+0100][5.822s] GC(1) User=0.00s Sys=0.00s Real=0.00s
[2020-03-05T11:48:20.563+0100][5.822s] GC(1) Concurrent Cleanup for Next Mark
[2020-03-05T11:48:20.565+0100][5.825s] GC(1) Concurrent Cleanup for Next Mark 
2.714ms
[2020-03-05T11:48:20.565+0100][5.825s] GC(1) Concurrent Cycle 64.785ms
[2020-03-05T11:55:25.930+0100][431.189s] GC(2) Pause Young (Normal) (G1 
Evacuation Pause)
[2020-03-05T11:55:25.930+0100][431.189s] GC(2) Using 4 workers of 4 for 
evacuation
[2020-03-05T11:55:25.980+0100][431.239s] GC(2)   Pre Evacuate Collection Set: 
0.0ms
[2020-03-05T11:55:25.980+0100][431.239s] GC(2)   Evacuate Collection Set: 43.9ms
[2020-03-05T11:55:25.980+0100][431.239s] GC(2)   Post Evacuate Collection Set: 
5.8ms
[2020-03-05T11:55:25.980+0100][431.239s] GC(2)   Other: 0.3ms
[2020-03-05T11:55:25.980+0100][431.239s] GC(2) Eden regions: 123->0(113)
[2020-03-05T11:55:25.980+0100][431.239s] GC(2) Survivor regions: 5->15(32)
[2020-03-05T11:55:25.980+0100][431.239s] GC(2) Old regions: 0->0
[2020-03-05T11:55:25.980+0100][431.239s] GC(2) Humongous regions: 0->0
[2020-03-05T11:55:25.980+0100][431.239s] GC(2) Metaspace: 
33842K->33842K(1079296K)
[2020-03-05T11:55:25.980+0100][431.239s] GC(2) Pause Young (Normal) (G1 
Evacuation Pause) 128M->14M(512M) 49.997ms
[2020-03-05T11:55:25.980+0100][431.239s] GC(2) User=0.05s Sys=0.01s Real=0.05s

The process is running fine:

ps -eaf | grep solr
solr      1013     1  0 11:48 ?        00:00:00 /lib/systemd/systemd --user
solr      1043  1013  0 11:48 ?        00:00:00 (sd-pam)
solr      1519     1  0 11:48 ?        00:00:09 java -server -Xms512m -Xmx512m 
-XX:NewRatio=3 -XX:SurvivorRatio=4 -XX:TargetSurvivorRatio=90 
-XX:MaxTenuringThreshold=8 -XX:ConcGCThreads=4 -XX:ParallelGCThreads=4 
-XX:+CMSScavengeBeforeRemark -XX:PretenureSizeThreshold=64m 
-XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=50 
-XX:CMSMaxAbortablePrecleanTime=6000 -XX:+CMSParallelRemarkEnabled 
-XX:+ParallelRefProcEnabled -verbose:gc 
-Xlog:gc*:file=/var/solr/logs/solr_gc.log:time,uptime:filecount=9,filesize=20M 
-Dsolr.log.dir=/var/solr/logs -Djetty.port=8983 -DSTOP.PORT=7983 
-DSTOP.KEY=solrrocks -Duser.timezone=UTC -Djetty.home=/opt/solr/server 
-Dsolr.solr.home=/var/solr/data -Dsolr.data.home=/var/solr/data 
-Dsolr.install.dir=/opt/solr 
-Dsolr.default.confdir=/opt/solr/server/solr/configsets/_default/conf 
-Dlog4j.configurationFile=file:/var/solr/log4j.properties -Xss256k 
-Dsolr.disable.configEdit=true -Xss256k -Dsolr.jetty.https.port=8983 
-Dsolr.log.muteconsole -XX:OnOutOfMemoryError=/opt/solr/bin/oom_solr.sh 8983 
/var/solr/logs -jar start.jar --module=http

Is someone able to give me a hint or something to solve this problem? Let me 
know if you might need more informationen.

Thanks and regards
Torsten

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