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HDFS-12744. More logs when short-circuit read is failed and disabled. Contributed by Weiwei Yang.

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(cherry picked from commit 56b88b06705441f6f171eec7fb2fa77946ca204b)
(cherry picked from commit 0f20434e18cfedcc36c969cc2df25123153e0b99)
This commit is contained in:
Weiwei Yang 2017-11-01 16:41:45 +08:00 committed by Subru Krishnan
parent d1accde1cd
commit 3555397179
2 changed files with 4 additions and 1 deletions
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3
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/client/impl/BlockReaderFactory.java
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@ -646,7 +646,8 @@ private ShortCircuitReplicaInfo requestFileDescriptors(DomainPeer peer,
default: default:
LOG.warn(this + ": unknown response code " + resp.getStatus() + LOG.warn(this + ": unknown response code " + resp.getStatus() +
" while attempting to set up short-circuit access. " + " while attempting to set up short-circuit access. " +
resp.getMessage()); resp.getMessage() + ". Disabling short-circuit read for DataNode "
+ datanode + " temporarily.");
clientContext.getDomainSocketFactory() clientContext.getDomainSocketFactory()
.disableShortCircuitForPath(pathInfo.getPath()); .disableShortCircuitForPath(pathInfo.getPath());
return null; return null;

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java
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@ -384,6 +384,8 @@ public void requestShortCircuitFds(final ExtendedBlock blk,
} catch (IOException e) { } catch (IOException e) {
bld.setStatus(ERROR); bld.setStatus(ERROR);
bld.setMessage(e.getMessage()); bld.setMessage(e.getMessage());
LOG.error("Request short-circuit read file descriptor" +
" failed with unknown error.", e);
} }
bld.build().writeDelimitedTo(socketOut); bld.build().writeDelimitedTo(socketOut);
if (fis != null) { if (fis != null) {