Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/23218
Surprisingly, all of three are due to consistent JVM crashes. It seems that
Scala 2.12.8 or Spark has some unstable code somewhere.
-
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/99679/consoleFull
```
[info] <span style="color: #00CD00;">- SPARK-17641: collect functions
should not collect null values (231 milliseconds)</span>
10:51:04.251 WARN org.apache.spark.sql.execution.window.WindowExec: No
Partition Defined for Window operation! Moving all data to a single partition,
this can cause serious performance degradation.
10:51:04.262 WARN org.apache.spark.sql.execution.window.WindowExec: No
Partition Defined for Window operation! Moving all data to a single partition,
this can cause serious performance degradation.
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fa843744e44, pid=116353, tid=140360030242560
```
-
https://amplab.cs.berkeley.edu/jenkins/job/NewSparkPullRequestBuilder/4451/consoleFull
```
[info] <span style="color: #00CD00;">- read from textfile (508
milliseconds)</span>
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f60ec641e44, pid=40380, tid=140053491689216
#
```
-
https://amplab.cs.berkeley.edu/jenkins/job/NewSparkPullRequestBuilder/4452/consoleFull
```
[info] <span style="color: #00CD00;">- SPARK-21996 read from text files
generated by file sink -- file name has space (532 milliseconds)</span>
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f399e84ee44, pid=106264, tid=139883238606592
#
```
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