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serious impala issue

Expert Contributor

today all the impala process crash suddenly, totally is 21 impala daemon, then I restart impala daemon and it's normally just a few second, then crash again.

the info logs is like below:

 

I0114 18:51:33.220736 24116 TAcceptQueueServer.cpp:218] connection_setup_thread_pool_size is set to 2
I0114 18:51:33.959517 23216 ImpaladCatalog.java:200] Adding: TABLE:oyo_behavior_dw.dw_search_log_sort_response version: 7346 size: 79
I0114 18:51:33.959635 23216 ImpaladCatalog.java:200] Adding: CATALOG_SERVICE_ID version: 7346 size: 49
I0114 18:51:33.960319 23216 impala-server.cc:1578] Catalog topic update applied with version: 7346 new min catalog object version: 1366
Wrote minidump to /var/log/impala-minidumps/impalad/73c0cda6-b4cc-4a4c-f8913e88-4ad72a7c.dmp
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f09a2b9a2c0, pid=22656, tid=0x00007f08d9e8f700
#
# JRE version: Java(TM) SE Runtime Environment (8.0_181-b13) (build 1.8.0_181-b13)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.181-b13 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C  [libc.so.6+0x1502c0]  __memmove_ssse3_back+0x50
#
# Core dump written. Default location: /var/log/impalad/core or core.22656
#
# An error report file with more information is saved as:
# /var/log/impalad/hs_err_pid22656.log
#
# If you would like to submit a bug report, please visit:
#   <a href="http://bugreport.java.com/bugreport/crash.jsp" target="_blank">http://bugreport.java.com/bugreport/crash.jsp</a>
#

 

because I have no idea what happened, so I click restart Botton again, I don't remember how many time I restart, because it's  always crashed after restart. 

this kind issues happened  two times, it seems this issue also happened one month ago.  I am not sure it's a bug or not. 

I have prepared dump file and core file, but how can I upload it? then may be you will find the root cause, thanks.

 

the below is hs_err_pid22656.log:

 

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f09a2b9a2c0, pid=22656, tid=0x00007f08d9e8f700
#
# JRE version: Java(TM) SE Runtime Environment (8.0_181-b13) (build 1.8.0_181-b13)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.181-b13 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C  [libc.so.6+0x1502c0]  __memmove_ssse3_back+0x50
#
# Core dump written. Default location: /var/log/impalad/core or core.22656
#
# If you would like to submit a bug report, please visit:
#   <a href="http://bugreport.java.com/bugreport/crash.jsp" target="_blank">http://bugreport.java.com/bugreport/crash.jsp</a>
#

---------------  T H R E A D  ---------------

Current thread is native thread

siginfo: si_signo: 11 (SIGSEGV), si_code: 128 (SI_KERNEL), si_addr: 0x0000000000000000

Registers:
RAX=0x000000000c7ec000, RBX=0x0000000000007f33, RCX=0x0000000000007f33, RDX=0x0000000000007f33
RSP=0x00007f08d9e8df68, RBP=0x00007f08d9e8df90, RSI=0x3131353538393300, RDI=0x000000000c7ec000
R8 =0x0000000000000000, R9 =0x0000000000000000, R10=0x0000000000002000, R11=0x0000000000000000
R12=0x3131353538393300, R13=0x0000000010b6c000, R14=0x000000000e2d8d00, R15=0x000000000ba54390
RIP=0x00007f09a2b9a2c0, EFLAGS=0x0000000000010206, CSGSFS=0x8348000000000033, ERR=0x0000000000000000
  TRAPNO=0x000000000000000d

Top of Stack: (sp=0x00007f08d9e8df68)
0x00007f08d9e8df68:   00000000010ec03a 00007f3300000000
0x00007f08d9e8df78:   000000000c7ec000 00000000110b9010
0x00007f08d9e8df88:   000000000e2ec348 00007f08d9e8dfa0
0x00007f08d9e8df98:   0000000000b7c7f1 00007f08d9e8dfd0
0x00007f08d9e8dfa8:   0000000000b7c816 0000000b00000000
0x00007f08d9e8dfb8:   0000000000000001 000000000db2f290
0x00007f08d9e8dfc8:   000000000f691f00 00007f08d9e8e070
0x00007f08d9e8dfd8:   00000000012fb96d 00007f08d9e8e020
0x00007f08d9e8dfe8:   0000000010277fe8 0025848e00000000
0x00007f08d9e8dff8:   00004519c6189a00 0000000000000031
0x00007f08d9e8e008:   0000000011e634e0 0025848e00000000
0x00007f08d9e8e018:   00004519c6189a00 00007f08d9e8e070
0x00007f08d9e8e028:   00000000012bfbc0 000000080025848e
0x00007f08d9e8e038:   0000000010be45a0 000000000025848e
0x00007f08d9e8e048:   0000000000000ab0 0000000000000000
0x00007f08d9e8e058:   000000000ba54000 00000000012fb530
0x00007f08d9e8e068:   000000000e2d8d00 0000000010b6c000
0x00007f08d9e8e078:   00007f08cc2595ff 0000000000000003
0x00007f08d9e8e088:   000000000e2d8d00 000004000cbadf40
0x00007f08d9e8e098:   00007f08d9e8e1e0 000000000cbadf40
0x00007f08d9e8e0a8:   000000000e2d8e00 0000000010278000
0x00007f08d9e8e0b8:   0000000000000003 00000000d5298327
0x00007f08d9e8e0c8:   000000000fd2f010 0000000000000400
--More--(1%)Instructions: (pc=0x00007f09a2b9a2c0)
0x00007f09a2b9a2a0:   fa 90 00 00 00 73 19 48 01 d6 48 01 d7 4c 8d 1d
0x00007f09a2b9a2b0:   1c 44 03 00 49 63 14 93 49 8d 14 13 ff e2 0f 0b
0x00007f09a2b9a2c0:   f3 0f 6f 06 49 89 f8 48 83 e7 f0 48 83 c7 10 49
0x00007f09a2b9a2d0:   89 f9 4d 29 c1 4c 29 ca 4c 01 ce 49 89 f1 49 83 

Register to memory mapping:

RAX=0x000000000c7ec000 is an unknown value
RBX=0x0000000000007f33 is an unknown value
RCX=0x0000000000007f33 is an unknown value
RDX=0x0000000000007f33 is an unknown value
RSP=0x00007f08d9e8df68 is an unknown value
RBP=0x00007f08d9e8df90 is an unknown value
RSI=0x3131353538393300 is an unknown value
RDI=0x000000000c7ec000 is an unknown value
R8 =0x0000000000000000 is an unknown value
R9 =0x0000000000000000 is an unknown value
R10=0x0000000000002000 is an unknown value
R11=0x0000000000000000 is an unknown value
R12=0x3131353538393300 is an unknown value
R13=0x0000000010b6c000 is an unknown value
R14=0x000000000e2d8d00 is an unknown value
R15=0x000000000ba54390 is an unknown value

Stack: [0x00007f08d968f000,0x00007f08d9e90000],  sp=0x00007f08d9e8df68,  free space=8187k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libc.so.6+0x1502c0]  __memmove_ssse3_back+0x50
C  [impalad+0x77c7f1]  impala::AggregateFunctions::StringValGetValue(impala_udf::FunctionContext*, impala_udf::StringVal const&)+0x21
C  [impalad+0x77c816]  impala::AggregateFunctions::StringValSerializeOrFinalize(impala_udf::FunctionContext*, impala_udf::StringVal const&)+0x16
C  [impalad+0xefb96d]  impala::AggFnEvaluator::SerializeOrFinalize(impala::Tuple*, impala::SlotDescriptor const&, impala::Tuple*, void*)+0x43d


VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap:
 PSYoungGen      total 1835008K, used 343247K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 21% used [0x0000000740000000,0x0000000754f33e68,0x00000007a0000000)
  from space 262144K, 0% used [0x00000007b0000000,0x00000007b0000000,0x00000007c0000000)
  to   space 262144K, 0% used [0x00000007a0000000,0x00000007a0000000,0x00000007b0000000)
 ParOldGen       total 4194304K, used 37858K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x00000006424f8a50,0x0000000740000000)
 Metaspace       used 35676K, capacity 35974K, committed 36352K, reserved 1081344K
  class space    used 3879K, capacity 4001K, committed 4096K, reserved 1048576K

Card table byte_map: [0x00007f098d6fe000,0x00007f098e2ff000] byte_map_base: 0x00007f098a4fe000

Marking Bits: (ParMarkBitMap*) 0x00007f09a60860a0
 Begin Bits: [0x00007f097f8e8000, 0x00007f09858e8000)
 End Bits:   [0x00007f09858e8000, 0x00007f098b8e8000)

Polling page: 0x00007f09a66ee000

CodeCache: size=245760Kb used=10577Kb max_used=12273Kb free=235182Kb
 bounds [0x00007f098e6bf000, 0x00007f098f2cf000, 0x00007f099d6bf000]
 total_blobs=3234 nmethods=2683 adapters=461
 compilation: enabled

Compilation events (10 events):
Event: 49.534 Thread 0x000000000a8ca800 3238       3       org.apache.hadoop.hdfs.protocol.DatanodeInfo$DatanodeInfoBuilder::build (97 bytes)
Event: 49.534 Thread 0x000000000a8c9000 3239       3       com.google.protobuf.UnmodifiableLazyStringList$2::next (5 bytes)
Event: 49.534 Thread 0x000000000a887000 nmethod 3236 0x00007f098f100750 code [0x00007f098f100920, 0x00007f098f101128]
Event: 49.534 Thread 0x000000000a887000 3240       3       com.google.protobuf.UnmodifiableLazyStringList$2::next (13 bytes)
Event: 49.534 Thread 0x000000000a8c8000 nmethod 3235 0x00007f098eb21c10 code [0x00007f098eb21de0, 0x00007f098eb225e8]
Event: 49.534 Thread 0x000000000a887000 nmethod 3240 0x00007f098ea55bd0 code [0x00007f098ea55d40, 0x00007f098ea56048]
Event: 49.534 Thread 0x000000000a887000 3241       3       com.google.protobuf.LazyStringArrayList::get (6 bytes)
Event: 49.535 Thread 0x000000000a887000 nmethod 3241 0x00007f098ea55810 code [0x00007f098ea55980, 0x00007f098ea55b28]
Event: 49.535 Thread 0x000000000a8c9000 nmethod 3239 0x00007f098ea57350 code [0x00007f098ea574e0, 0x00007f098ea57848]
Event: 49.535 Thread 0x000000000a8ca800 nmethod 3238 0x00007f098eb47110 code [0x00007f098eb47280, 0x00007f098eb47648]

GC Heap History (8 events):
Event: 1.729 GC heap before
{Heap before GC invocations=1 (full 0):
 PSYoungGen      total 1835008K, used 534775K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 34% used [0x0000000740000000,0x0000000760a3dc70,0x00000007a0000000)
  from space 262144K, 0% used [0x00000007b0000000,0x00000007b0000000,0x00000007c0000000)
  to   space 262144K, 0% used [0x00000007a0000000,0x00000007a0000000,0x00000007b0000000)
 ParOldGen       total 4194304K, used 0K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x0000000640000000,0x0000000740000000)
 Metaspace       used 21009K, capacity 21174K, committed 21296K, reserved 1069056K
  class space    used 2350K, capacity 2410K, committed 2432K, reserved 1048576K
Event: 1.749 GC heap after
Heap after GC invocations=1 (full 0):
 PSYoungGen      total 1835008K, used 17868K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 0% used [0x0000000740000000,0x0000000740000000,0x00000007a0000000)
  from space 262144K, 6% used [0x00000007a0000000,0x00000007a1173250,0x00000007b0000000)
  to   space 262144K, 0% used [0x00000007b0000000,0x00000007b0000000,0x00000007c0000000)
 ParOldGen       total 4194304K, used 16K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x0000000640004000,0x0000000740000000)
 Metaspace       used 21009K, capacity 21174K, committed 21296K, reserved 1069056K
  class space    used 2350K, capacity 2410K, committed 2432K, reserved 1048576K
}
Event: 1.749 GC heap before
{Heap before GC invocations=2 (full 1):
 PSYoungGen      total 1835008K, used 17868K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 0% used [0x0000000740000000,0x0000000740000000,0x00000007a0000000)
  from space 262144K, 6% used [0x00000007a0000000,0x00000007a1173250,0x00000007b0000000)
  to   space 262144K, 0% used [0x00000007b0000000,0x00000007b0000000,0x00000007c0000000)
 ParOldGen       total 4194304K, used 16K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x0000000640004000,0x0000000740000000)
 Metaspace       used 21009K, capacity 21174K, committed 21296K, reserved 1069056K
  class space    used 2350K, capacity 2410K, committed 2432K, reserved 1048576K
Event: 1.780 GC heap after
Heap after GC invocations=2 (full 1):
 PSYoungGen      total 1835008K, used 0K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 0% used [0x0000000740000000,0x0000000740000000,0x00000007a0000000)
  from space 262144K, 0% used [0x00000007a0000000,0x00000007a0000000,0x00000007b0000000)
  to   space 262144K, 0% used [0x00000007b0000000,0x00000007b0000000,0x00000007c0000000)
 ParOldGen       total 4194304K, used 16570K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x000000064102eac0,0x0000000740000000)
 Metaspace       used 21009K, capacity 21174K, committed 21296K, reserved 1069056K
  class space    used 2350K, capacity 2410K, committed 2432K, reserved 1048576K
}
Event: 48.627 GC heap before
{Heap before GC invocations=3 (full 1):
 PSYoungGen      total 1835008K, used 597742K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 38% used [0x0000000740000000,0x00000007647bb868,0x00000007a0000000)
  from space 262144K, 0% used [0x00000007a0000000,0x00000007a0000000,0x00000007b0000000)
  to   space 262144K, 0% used [0x00000007b0000000,0x00000007b0000000,0x00000007c0000000)
 ParOldGen       total 4194304K, used 16570K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x000000064102eac0,0x0000000740000000)
 Metaspace       used 34984K, capacity 35258K, committed 35456K, reserved 1081344K
  class space    used 3827K, capacity 3935K, committed 3968K, reserved 1048576K
Event: 48.653 GC heap after
Heap after GC invocations=3 (full 1):
 PSYoungGen      total 1835008K, used 34295K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 0% used [0x0000000740000000,0x0000000740000000,0x00000007a0000000)
  from space 262144K, 13% used [0x00000007b0000000,0x00000007b217df00,0x00000007c0000000)
  to   space 262144K, 0% used [0x00000007a0000000,0x00000007a0000000,0x00000007b0000000)
 ParOldGen       total 4194304K, used 16642K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x0000000641040ad0,0x0000000740000000)
 Metaspace       used 34984K, capacity 35258K, committed 35456K, reserved 1081344K
  class space    used 3827K, capacity 3935K, committed 3968K, reserved 1048576K
}
Event: 48.653 GC heap before
{Heap before GC invocations=4 (full 2):
 PSYoungGen      total 1835008K, used 34295K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 0% used [0x0000000740000000,0x0000000740000000,0x00000007a0000000)
  from space 262144K, 13% used [0x00000007b0000000,0x00000007b217df00,0x00000007c0000000)
  to   space 262144K, 0% used [0x00000007a0000000,0x00000007a0000000,0x00000007b0000000)
 ParOldGen       total 4194304K, used 16642K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x0000000641040ad0,0x0000000740000000)
 Metaspace       used 34984K, capacity 35258K, committed 35456K, reserved 1081344K
  class space    used 3827K, capacity 3935K, committed 3968K, reserved 1048576K
Event: 48.723 GC heap after
Heap after GC invocations=4 (full 2):
 PSYoungGen      total 1835008K, used 0K [0x0000000740000000, 0x00000007c0000000, 0x00000007c0000000)
  eden space 1572864K, 0% used [0x0000000740000000,0x0000000740000000,0x00000007a0000000)
  from space 262144K, 0% used [0x00000007b0000000,0x00000007b0000000,0x00000007c0000000)
  to   space 262144K, 0% used [0x00000007a0000000,0x00000007a0000000,0x00000007b0000000)
 ParOldGen       total 4194304K, used 37858K [0x0000000640000000, 0x0000000740000000, 0x0000000740000000)
  object space 4194304K, 0% used [0x0000000640000000,0x00000006424f8a50,0x0000000740000000)
 Metaspace       used 34984K, capacity 35258K, committed 35456K, reserved 1081344K
  class space    used 3827K, capacity 3935K, committed 3968K, reserved 1048576K
}

Deoptimization events (10 events):
Event: 48.500 Thread 0x00000000116b0800 Uncommon trap: reason=bimorphic action=maybe_recompile pc=0x00007f098f2b9cf4 method=java.util.AbstractCollection.isEmpty()Z @ 1
Event: 48.501 Thread 0x00000000116b0800 Uncommon trap: reason=class_check action=maybe_recompile pc=0x00007f098edd45c4 method=java.io.DataOutputStream.write(I)V @ 5
Event: 48.504 Thread 0x00000000116b0800 Uncommon trap: reason=predicate action=maybe_recompile pc=0x00007f098f05b814 method=java.util.regex.Pattern$Slice.match(Ljava/util/regex/Matcher;ILjava/lang/CharSequence;)Z @ 21
Event: 48.565 Thread 0x00000000116b0800 Uncommon trap: reason=bimorphic action=maybe_recompile pc=0x00007f098ed93d30 method=java.io.DataOutputStream.writeShort(I)V @ 12
Event: 48.611 Thread 0x00000000116b0800 Uncommon trap: reason=bimorphic action=maybe_recompile pc=0x00007f098ed93d30 method=java.io.DataOutputStream.writeShort(I)V @ 12
Event: 48.748 Thread 0x00000000113a3000 Uncommon trap: reason=bimorphic action=maybe_recompile pc=0x00007f098ed93d30 method=java.io.DataOutputStream.writeShort(I)V @ 12
Event: 49.379 Thread 0x0000000010d9d800 Uncommon trap: reason=bimorphic action=maybe_recompile pc=0x00007f098ed93d30 method=java.io.DataOutputStream.writeShort(I)V @ 12
Event: 49.394 Thread 0x0000000011db3000 Uncommon trap: reason=unstable_if action=reinterpret pc=0x00007f098ecabce4 method=java.util.concurrent.ConcurrentHashMap.putVal(Ljava/lang/Object;Ljava/lang/Object;Z)Ljava/lang/Object; @ 98
Event: 49.417 Thread 0x0000000011db3000 Uncommon trap: reason=unstable_if action=reinterpret pc=0x00007f098f17840c method=java.lang.Long.getChars(JI[C)V @ 94
Event: 49.417 Thread 0x0000000011db3000 Uncommon trap: reason=unstable_if action=reinterpret pc=0x00007f098f15c058 method=java.lang.Long.getChars(JI[C)V @ 94

Classes redefined (0 events):
No events

Internal exceptions (10 events):
Event: 0.586 Thread 0x0000000005b00000 Exception <a 'java/lang/ArrayIndexOutOfBoundsException'> (0x000000074df5c958) thrown at [/HUDSON/workspace/8-2-build-linux-amd64/jdk8u181/11358/hotspot/src/share/vm/runtime/sharedRuntime.cpp, line 605]
Event: 0.847 Thread 0x0000000005b00000 Exception <a 'java/lang/NoSuchFieldError': method resolution failed> (0x0000000750246b38) thrown at [/HUDSON/workspace/8-2-build-linux-amd64/jdk8u181/11358/hotspot/src/share/vm/prims/methodHandles.cpp, line 1
167]
Event: 0.848 Thread 0x0000000005b00000 Exception <a 'java/lang/NoSuchFieldError': method resolution failed> (0x00000007502541f8) thrown at [/HUDSON/workspace/8-2-build-linux-amd64/jdk8u181/11358/hotspot/src/share/vm/prims/methodHandles.cpp, line 1
167]
Event: 1.939 Thread 0x0000000005b00000 Exception <a 'java/lang/NoClassDefFoundError': org/apache/hadoop/hbase/client/ScannerTimeoutException> (0x00000007483e1258) thrown at [/HUDSON/workspace/8-2-build-linux-amd64/jdk8u181/11358/hotspot/src/share/
vm/classfile/systemDictionary.cpp, line 199]
Event: 1.939 Thread 0x0000000005b00000 Exception <a 'java/lang/NoSuchMethodError': setCaching> (0x00000007483e14b8) thrown at [/HUDSON/workspace/8-2-build-linux-amd64/jdk8u181/11358/hotspot/src/share/vm/prims/jni.cpp, line 1613]
Event: 1.945 Thread 0x0000000005b00000 Exception <a 'java/lang/NoSuchMethodError': java.lang.Object.lambda$static$0(Lorg/apache/hadoop/hbase/client/Row;Lorg/apache/hadoop/hbase/client/Row;)I> (0x00000007484ee2e0) thrown at [/HUDSON/workspace/8-2-b
uild-linux-amd64/jdk8u181/11358/hotspot/src/sha
Event: 2.168 Thread 0x0000000005b00000 Exception <a 'java/lang/ClassNotFoundException': org/apache/impala/util/GlogAppenderBeanInfo> (0x00000007499aaae0) thrown at [/HUDSON/workspace/8-2-build-linux-amd64/jdk8u181/11358/hotspot/src/share/vm/classf
ile/systemDictionary.cpp, line 210]
Event: 2.169 Thread 0x0000000005b00000 Exception <a 'java/lang/ClassNotFoundException': org/apache/impala/util/GlogAppenderCustomizer> (0x00000007499eb348) thrown at [/HUDSON/workspace/8-2-build-linux-amd64/jdk8u181/11358/hotspot/src/share/vm/clas
sfile/systemDictionary.cpp, line 210]
Event: 2.169 Thread 0x0000000005b00000 Implicit null exception at 0x00007f098eaf6cf6 to 0x00007f098eaf70b5
Event: 15.697 Thread 0x000000000fbdd000 Implicit null exception at 0x00007f098f21b80c to 0x00007f098f21b82e

 

 

 

1 REPLY 1

Crashes in Impala are definitely a bug. It could be bug in Impala itself or it could be a bug in a user-defined function (a buggy user-defined function could definitely cause a crash there).

 

We don't have anything recent in the impala bug tracker (https://issues.apache.org/jira/projects/IMPALA) that looks like the crash. So I'm suspicious that it might be a user-defined function.

 

I'd suggest:

  1. Looking into whether any user-defined functions are being loaded and used by impala
  2. Creating a support case if you have a cloudera support contract
  3. Reporting the bug. See "reporting bugs" here: https://cwiki.apache.org/confluence/display/IMPALA/Contributing+to+Impala
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