[jira] [Created] (ARROW-6202) Exception in thread "main" org.apache.arrow.memory.OutOfMemoryException: Unable to allocate buffer of size 4 due to memory limit. Current allocation: 2147483646

["Jim Northrup (JIRA)" <ji...@apache.org>]

Jim Northrup created ARROW-6202:
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             Summary: Exception in thread "main" org.apache.arrow.memory.OutOfMemoryException: Unable to allocate buffer of size 4 due to memory limit. Current allocation: 2147483646
                 Key: ARROW-6202
                 URL: https://issues.apache.org/jira/browse/ARROW-6202
             Project: Apache Arrow
          Issue Type: Bug
    Affects Versions: 0.14.1
            Reporter: Jim Northrup



jdbc query results exceed native heap when using generous -Xmx settings. 

for roughly 800 megabytes of csv/flatfile resultset, arrow is unable to house the contents in RAM long enough to persist to disk, without explicit knowledge beyond unit test sample code.

source:
https://github.com/jnorthrup/jdbc2json/blob/master/src/main/java/com/fnreport/QueryToFeather.kt#L83


{code:java}
Exception in thread "main" org.apache.arrow.memory.OutOfMemoryException: Unable to allocate buffer of size 4 due to memory limit. Current allocation: 2147483646
        at org.apache.arrow.memory.BaseAllocator.buffer(BaseAllocator.java:307)
        at org.apache.arrow.memory.BaseAllocator.buffer(BaseAllocator.java:277)
        at org.apache.arrow.adapter.jdbc.JdbcToArrowUtils.updateVector(JdbcToArrowUtils.java:610)
        at org.apache.arrow.adapter.jdbc.JdbcToArrowUtils.jdbcToFieldVector(JdbcToArrowUtils.java:462)
        at org.apache.arrow.adapter.jdbc.JdbcToArrowUtils.jdbcToArrowVectors(JdbcToArrowUtils.java:396)
        at org.apache.arrow.adapter.jdbc.JdbcToArrow.sqlToArrow(JdbcToArrow.java:225)
        at org.apache.arrow.adapter.jdbc.JdbcToArrow.sqlToArrow(JdbcToArrow.java:187)
        at org.apache.arrow.adapter.jdbc.JdbcToArrow.sqlToArrow(JdbcToArrow.java:156)
        at com.fnreport.QueryToFeather$Companion.go(QueryToFeather.kt:83)
        at com.fnreport.QueryToFeather$Companion$main$1.invokeSuspend(QueryToFeather.kt:95)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:241)
        at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:270)
        at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:79)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:54)
        at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:36)
        at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
        at com.fnreport.QueryToFeather$Companion.main(QueryToFeather.kt:93)
        at com.fnreport.QueryToFeather.main(QueryToFeather.kt)
{code}





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