pcallahan-r7 opened a new issue #11855:
URL: https://github.com/apache/druid/issues/11855
Please provide a detailed title (e.g. "Broker crashes when using TopN query
with Bound filter" instead of just "Broker crashes").
### Affected Version
0.22.0
### Description
Running a druid micro instance. I'm using the avatica jdbc driver (1.18.0)
on the client side to make SQL queries to druid.
About 50% of the calls result in an "UncategorizedSQLException" on the
client. On the druid side, there is this exception:
```
[org.apache.calcite.avatica.NoSuchConnectionException
at
org.apache.druid.sql.avatica.DruidMeta.getDruidConnection(DruidMeta.java:590)
at
org.apache.druid.sql.avatica.DruidMeta.createStatement(DruidMeta.java:139)
at org.apache.druid.sql.avatica.DruidMeta.prepare(DruidMeta.java:150)
at
org.apache.calcite.avatica.remote.LocalService.apply(LocalService.java:195)
at
org.apache.calcite.avatica.remote.Service$PrepareRequest.accept(Service.java:1215)
at
org.apache.calcite.avatica.remote.Service$PrepareRequest.accept(Service.java:1186)
at
org.apache.calcite.avatica.remote.AbstractHandler.apply(AbstractHandler.java:94)
at
org.apache.calcite.avatica.remote.JsonHandler.apply(JsonHandler.java:52)
at
org.apache.calcite.avatica.server.AvaticaJsonHandler.handle(AvaticaJsonHandler.java:133)
at
org.apache.druid.sql.avatica.DruidAvaticaJsonHandler.handle(DruidAvaticaJsonHandler.java:59)
at
org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:59)
at
org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:179)
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:516)
at
org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
at
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
at
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:383)
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:882)
at
org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1036)
at java.lang.Thread.run(Thread.java:748)
]
```
The SQL queries are simple and they work about 50% of the time. Also
using Spring Hikari connection pool, if that matters.
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