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https://issues.apache.org/jira/browse/MAPREDUCE-6024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14100251#comment-14100251
]
zhaoyunjiong commented on MAPREDUCE-6024:
-----------------------------------------
The reason I moved below code out is due to the number of hostFailures added
in copyFailed is depend on the number of maps, and the number of maps could be
1 to 20, one SocketTimeoutException could add very different # of failures to
hostFailuers.
{code}
+ if (hostFailures.containsKey(hostname)) {
+ IntWritable x = hostFailures.get(hostname);
+ x.set(x.get() + 1);
+ } else {
+ hostFailures.put(hostname, new IntWritable(1));
+ }
{code}
> java.net.SocketTimeoutException in Fetcher caused jobs stuck for more than 1
> hour
> ---------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6024
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6024
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mr-am, task
> Reporter: zhaoyunjiong
> Assignee: zhaoyunjiong
> Priority: Critical
> Attachments: MAPREDUCE-6024.1.patch, MAPREDUCE-6024.2.patch,
> MAPREDUCE-6024.3.patch, MAPREDUCE-6024.4.patch, MAPREDUCE-6024.5.patch,
> MAPREDUCE-6024.patch
>
>
> 2014-08-04 21:09:42,356 WARN fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.Fetcher: Failed to connect to
> fake.host.name:13562 with 2 map outputs
> java.net.SocketTimeoutException: Read timed out
> at java.net.SocketInputStream.socketRead0(Native Method)
> at java.net.SocketInputStream.read(SocketInputStream.java:129)
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
> at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:697)
> at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:640)
> at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195)
> at
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:289)
> at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:165)
> 2014-08-04 21:09:42,360 INFO fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl:
> fake.host.name:13562 freed by fetcher#33 in 180024ms
> 2014-08-04 21:09:55,360 INFO fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl: Assigning
> fake.host.name:13562 with 3 to fetcher#33
> 2014-08-04 21:09:55,360 INFO fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl: assigned 3 of 3
> to fake.host.name:13562 to fetcher#33
> 2014-08-04 21:12:55,463 WARN fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.Fetcher: Failed to connect to
> fake.host.name:13562 with 3 map outputs
> java.net.SocketTimeoutException: Read timed out
> at java.net.SocketInputStream.socketRead0(Native Method)
> at java.net.SocketInputStream.read(SocketInputStream.java:129)
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
> at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:697)
> at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:640)
> at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195)
> at
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:289)
> at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:165)
> ...
> 2014-08-04 22:03:13,416 INFO fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl:
> fake.host.name:13562 freed by fetcher#33 in 271081ms
> 2014-08-04 22:04:13,417 INFO fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl: Assigning
> fake.host.name:13562 with 3 to fetcher#33
> 2014-08-04 22:04:13,417 INFO fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl: assigned 3 of 3
> to fake.host.name:13562 to fetcher#33
> 2014-08-04 22:07:13,449 WARN fetcher#33
> org.apache.hadoop.mapreduce.task.reduce.Fetcher: Failed to connect to
> fake.host.name:13562 with 3 map outputs
> java.net.SocketTimeoutException: Read timed out
> at java.net.SocketInputStream.socketRead0(Native Method)
> at java.net.SocketInputStream.read(SocketInputStream.java:129)
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
> at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:697)
> at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:640)
> at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195)
> at
> org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:289)
> at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:165)
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