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HDFS-4745. TestDataTransferKeepalive#testSlowReader has race condition that causes sporadic failure. Contributed by Chris Nauroth. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1475623 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2013-04-25 04:25:58 +00:00
parent e96077aaf4
commit 16ef8dd3a5
2 changed files with 23 additions and 4 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -588,6 +588,9 @@ Release 2.0.5-beta - UNRELEASED
HDFS-4739. NN can miscalculate the number of extra edit log segments to
retain. (atm)
HDFS-4745. TestDataTransferKeepalive#testSlowReader has race condition that
causes sporadic failure. (Chris Nauroth via suresh)
Release 2.0.4-alpha - UNRELEASED
INCOMPATIBLE CHANGES

24
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDataTransferKeepalive.java
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@ -146,7 +146,15 @@ public class TestDataTransferKeepalive {
stm.read();
assertXceiverCount(1);
Thread.sleep(WRITE_TIMEOUT + 1000);
// Poll for 0 running xceivers. Allow up to 5 seconds for some slack.
long totalSleepTime = 0;
long sleepTime = WRITE_TIMEOUT + 100;
while (getXceiverCountWithoutServer() > 0 && totalSleepTime < 5000) {
Thread.sleep(sleepTime);
totalSleepTime += sleepTime;
sleepTime = 100;
}
// DN should time out in sendChunks, and this should force
// the xceiver to exit.
assertXceiverCount(0);
@ -190,9 +198,7 @@ public class TestDataTransferKeepalive {
}
private void assertXceiverCount(int expected) {
// Subtract 1, since the DataXceiverServer
// counts as one
int count = dn.getXceiverCount() - 1;
int count = getXceiverCountWithoutServer();
if (count != expected) {
ReflectionUtils.printThreadInfo(
new PrintWriter(System.err),
@ -201,4 +207,14 @@ public class TestDataTransferKeepalive {
count);
}
}
/**
* Returns the datanode's xceiver count, but subtracts 1, since the
* DataXceiverServer counts as one.
*
* @return int xceiver count, not including DataXceiverServer
*/
private int getXceiverCountWithoutServer() {
return dn.getXceiverCount() - 1;
}
}