Race condition still exists in StreamingUpdateSolrServer which could cause it
to hang
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Key: SOLR-2308
URL: https://issues.apache.org/jira/browse/SOLR-2308
Project: Solr
Issue Type: Bug
Components: clients - java
Affects Versions: 1.4.1
Reporter: Johannes
We are still seeing the same issue as SOLR-1711 & SOLR-1885 with Solr1.4.1
We get into this situation when all the runner threads die due to a broken
pipe, while the BlockingQueue is still full. All of the producer threads are
all blocked on the BlockingQueue.put() method. Since the runners are spawned by
the producers, which are all blocked, runner threads never get created to drain
the queue.
Here's a potential fix. In the runner code, replace these lines:
// remove it from the list of running things...
synchronized (runners) { runners.remove( this ); }
with these lines:
// remove it from the list of running things unless we are the last runner and
the queue is full...
synchronized (runners) {
if (runners.size() == 1 && queue.remainingCapacity() == 0) { // keep this
runner alive scheduler.execute(this); } else { runners.remove( this ); }
}
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