Java Code Examples for org.apache.hadoop.hdfs.util.LightWeightHashSet#pollN()
The following examples show how to use
org.apache.hadoop.hdfs.util.LightWeightHashSet#pollN() .
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Example 1
Source File: InvalidateBlocks.java From hadoop with Apache License 2.0 | 5 votes |
synchronized List<Block> invalidateWork(final DatanodeDescriptor dn) { final long delay = getInvalidationDelay(); if (delay > 0) { if (BlockManager.LOG.isDebugEnabled()) { BlockManager.LOG .debug("Block deletion is delayed during NameNode startup. " + "The deletion will start after " + delay + " ms."); } return null; } final LightWeightHashSet<Block> set = node2blocks.get(dn); if (set == null) { return null; } // # blocks that can be sent in one message is limited final int limit = blockInvalidateLimit; final List<Block> toInvalidate = set.pollN(limit); // If we send everything in this message, remove this node entry if (set.isEmpty()) { remove(dn); } dn.addBlocksToBeInvalidated(toInvalidate); numBlocks -= toInvalidate.size(); return toInvalidate; }
Example 2
Source File: InvalidateBlocks.java From big-c with Apache License 2.0 | 5 votes |
synchronized List<Block> invalidateWork(final DatanodeDescriptor dn) { final long delay = getInvalidationDelay(); if (delay > 0) { if (BlockManager.LOG.isDebugEnabled()) { BlockManager.LOG .debug("Block deletion is delayed during NameNode startup. " + "The deletion will start after " + delay + " ms."); } return null; } final LightWeightHashSet<Block> set = node2blocks.get(dn); if (set == null) { return null; } // # blocks that can be sent in one message is limited final int limit = blockInvalidateLimit; final List<Block> toInvalidate = set.pollN(limit); // If we send everything in this message, remove this node entry if (set.isEmpty()) { remove(dn); } dn.addBlocksToBeInvalidated(toInvalidate); numBlocks -= toInvalidate.size(); return toInvalidate; }