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https://issues.apache.org/jira/browse/CASSANDRA-11960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15318414#comment-15318414
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Stefan Podkowinski commented on CASSANDRA-11960:
------------------------------------------------
This looks like this was caused by CASSANDRA-5863, where the
{{RandomAccessReader}} based input has been replaced with
{{RebufferingInputStream}}.
The way I understand how hint dispatching is currently implemented is that we
deliver hints from a file by sending individual {{HintsReader.Page}} s until
finished. In cases of any error while transmitting a page,
{{HintsStore.markDispatchOffset}} will be used to remember from where to resume
delivering hints by using a long offset. Since the byte offset based seek isn't
supported anymore due to mentioned changes, the exception is thrown.
> Hints are not seekable
> ----------------------
>
> Key: CASSANDRA-11960
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11960
> Project: Cassandra
> Issue Type: Bug
> Reporter: Robert Stupp
>
> Got the following error message on trunk. No idea how to reproduce. But the
> only thing the (not overridden) seek method does is throwing this exception.
> {code}
> ERROR [HintsDispatcher:2] 2016-06-05 18:51:09,397 CassandraDaemon.java:222 -
> Exception in thread Thread[HintsDispatcher:2,1,main]
> java.lang.UnsupportedOperationException: Hints are not seekable.
> at org.apache.cassandra.hints.HintsReader.seek(HintsReader.java:114)
> ~[main/:na]
> at
> org.apache.cassandra.hints.HintsDispatcher.seek(HintsDispatcher.java:79)
> ~[main/:na]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.deliver(HintsDispatchExecutor.java:257)
> ~[main/:na]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:242)
> ~[main/:na]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.dispatch(HintsDispatchExecutor.java:220)
> ~[main/:na]
> at
> org.apache.cassandra.hints.HintsDispatchExecutor$DispatchHintsTask.run(HintsDispatchExecutor.java:199)
> ~[main/:na]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> ~[na:1.8.0_91]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> ~[na:1.8.0_91]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> ~[na:1.8.0_91]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> [na:1.8.0_91]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]
> {code}
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