Grigore Lupescu created HBASE-27742:
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Summary: Hbase shell non interactive stalls
Key: HBASE-27742
URL: https://issues.apache.org/jira/browse/HBASE-27742
Project: HBase
Issue Type: Bug
Components: shell
Affects Versions: 2.4.8
Environment: This may very well be a general limitation or bug, not
tied to a specific version
Reporter: Grigore Lupescu
The following bash shell script invocations may stall or not `hbase shell -n`
indefinitely. This might be how tty / pipes interact with the hbase shell.
Opening this to better understand either if this is a bug or limitation in
hbase shell, or what workarounds are there.
{color:#00875a}Works executed in CLI bash{color}
{code:java}
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout 30s bash -c check_alter_hbase{code}
{color:#de350b}Doesn't work as bash script, stalls until timeout ** {color}
{code:java}
# cat stall.sh
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout 30s bash -c check_alter_hbase
# echo $?
124{code}
{color:#00875a}Works executed in CLI as bash script{color}
{code:java}
# cat works.sh
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout --foreground 30s bash -c check_alter_hbase
# bash works.sh
Table my_table is ENABLED ...
# echo $?
0{code}
{color:#FF0000}Doesn't work as internal init script, stalls (called indirectly
not via CLI){color}
{code:java}
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout --foreground 30s bash -c check_alter_hbase{code}
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