Do not use a background thread to disconnect node which are removed from the ClusterState #7543
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…ing it (after a ping failure) After a node fails to respond to a ping correctly (master or node fault detection), they are removed from the cluster state through an UpdateTask. When a node is removed, a background task is scheduled using the generic threadpool to actually disconnect the node. However, in the case of temporary node failures (for example) it may be that the node was re-added by the time the task get executed. We should check for that.
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I think simpler solution is just to remove the execution on a different thread, disconnect should be super cheap |
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@kimchy updated with another commit. I'll change the description before pushing (assuming no more feedback) |
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just to be safe, I would wrap each disconnect in a try ... catch block, similar to the connect code before. Other than that, LGTM. |
bleskes
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Sep 3, 2014
…e remove from the ClusterState After a node fails to respond to a ping correctly (master or node fault detection), they are removed from the cluster state through an UpdateTask. When a node is removed, a background task is scheduled using the generic threadpool to actually disconnect the node. However, in the case of temporary node failures (for example) it may be that the node was re-added by the time the task get executed, causing an untimely disconnect call. Disconnect is cheep and should be done during the UpdateTask. Closes #7543
bleskes
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bleskes
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Sep 8, 2014
…e remove from the ClusterState After a node fails to respond to a ping correctly (master or node fault detection), they are removed from the cluster state through an UpdateTask. When a node is removed, a background task is scheduled using the generic threadpool to actually disconnect the node. However, in the case of temporary node failures (for example) it may be that the node was re-added by the time the task get executed, causing an untimely disconnect call. Disconnect is cheep and should be done during the UpdateTask. Closes #7543
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After a node fails to respond to a ping correctly (master or node fault detection), they are removed from the cluster state through an UpdateTask. When a node is removed, a background task is scheduled using the generic threadpool to actually disconnect the node. However, in the case of temporary node failures (for example) it may be that the node was re-added by the time the task get executed, causing an untimely disconnect call. Disconnect is cheep and should be done during the UpdateTask.